So we’ve almost reached the end of the year 2015, which could go down in the history of global sustainable development efforts as one of the more significant years, with the trifecta of the approval of the Sustainable Development Goals (SDGs), the agreement on the Addis Agenda on Financing for Development (FfD) and the (shortly to be completed) Paris COP21 Climate Summit. Yet, all will depend on how the agreements with their ambitious targets are implemented on the ground.

Effective implementation will require a theory of change—a way to think about how we are to get from “here” in 2015 to “there” in 2030. The key problem is what has very appropriately been called by some “the missing middle,” i.e., the gap between the top-down global targets on the one hand and the bottom-up development initiatives, projects, and programs that are supported by governments, aid agencies, foundations, and social entrepreneurs.

One way to begin to close this gap is to aim for scaled-up global efforts in specific areas, as is pledged in the Addis Agenda, including efforts to fight global hunger and malnutrition, international tax cooperation and international cooperation to strengthen capacities of municipalities and other local authorities, investments and international coopera­tion to allow all children to complete free, equitable, inclusive and quality early childhood, primary and secondary education, and concessional and non-concessional financing.

Another way is to develop country-specific national targets and plans consistent with the SDG, Addis, and COP21 targets, as is currently being done with the assistance of the United Nations Development Program’s MAPS program. This can provide broad guidance on policy priorities and resource mobilization strategies to be pursued at the national level and can help national and international actors to prioritize their interventions in areas where a country’s needs are greatest.

However, calling for expanded global efforts in particular priority areas and defining national targets and plans is not enough. Individual development actors have to link their specific projects and programs with the national SDG, Addis, and COP21 targets. They systematically have to pursue a scaling-up strategy in their areas of engagement, i.e., to develop and pursue pathways from individual time-bound interventions to impact at a scale in a way that will help achieve the global and national targets. A recent paper I co-authored with Larry Cooley summarizes two complementary approaches of how one might design and implement such scaling-up pathways. The main point, however, is that only the pursuit of such scaling-up pathways constitutes a meaningful theory of change that offers hope for effective implementation of the new global sustainable development targets.

Fortunately, over the last decade, development analysts and agencies have increasingly focused on the question of how to scale up impact of successful development interventions. Leading the charge, the World Bank in 2004, under its president Jim Wolfensohn, organized a high-level international conference in Shanghai in cooperation with the Chinese authorities on the topic of scaling up development impact and published the associated analytical work. However, with changes in the leadership at the World Bank, the initiative passed to others in the mid-2000s, including the Brookings Institution, ExpandNet (a group of academics working with the World Health Organization), Management Systems International (MSI), and Stanford University. They developed analytical frameworks for systematically assessing scalability of development initiatives and innovations, analyzed the experience with more or less successful scaling-up initiatives, including in fragile and conflict-affected states, and established networks that bring together development experts and practitioners to share knowledge.

By now, many international development agencies (including GIZ, JICA, USAID, African Development Bank, IFAD and UNDP), foundations (including the Bill & Melinda Gates Foundation and Rockefeller Foundation) and leading development NGOs (including Heifer International, Save the Children and the World Resources Institute), among others, have focused on how best to scale up development impact, while the OECD recently introduced a prize for the most successful scaling-up development initiatives. The International Fund for Agricultural Development (IFAD) is perhaps the most advanced among the agencies, having developed a systematic operational approach to the innovation-learning-scaling-up cycle. In a collaborative effort with the Brookings Institution, IFAD reviewed its operational practices and experience and then prepared operational design and evaluation guidelines, which can serve as a good example for other development agencies. The World Bank, while yet to develop a systematic institution-wide approach to the scaling-up agenda, is exploring in specific areas how best to pursue scaled-up impact, such as in the areas of mother and child health, social enterprise innovation, and the “science of delivery.”

Now that the international community has agreed on the SDGs and the Addis Agenda, and is closing in on an agreement in Paris on how to respond to climate change, it is the right time to bridge the “missing middle” by linking the sustainable development and climate targets with effective scaling-up methodologies and practices among the development actors. In practical terms, this requires the following steps:

• Developing shared definitions, analytical frameworks, and operational approaches to scaling up among development experts;
• Developing sectoral and sub-sectoral strategies at country level that link short- and medium-term programs and interventions through scaling-up pathways with the longer-term SDG and climate targets;
• Introducing effective operational policies and practices in the development agencies in country strategies, project design, and monitoring and evaluation;
• Developing multi-stakeholder partnerships around key development interventions with the shared goal of pursuing well-identified scaling-up pathways focused on the achievement of the SDGs and climate targets;
• Developing incentive schemes based on the growing experience with “challenge funds” that focus not only on innovation, but also on scaling up, such as the recently established Global Innovation Fund; and
• Further building up expert and institutional networks to share experience and approaches, such as the Community of Practice on Scaling Up, recently set up by MSI and the Results for Development Institute.

I had been mulling a rebuttal to my colleague and friend Jon Rauch’s interesting—but wrong—new Brookings paper praising the role of “hacks, machines, big money, and back room deals” in democracy. I thought the indictments of Chris Christie’s associates last week provided a perfect example of the dangers of all of that, and so of why Jon was incorrect. But in yesterday’s L.A. Times, he beat me to it, himself defending the political morality (if not the efficacy) of their actions, and in the process delivering a knockout blow to his own position.

Bridgegate is a perfect example of why we need fewer "hacks, machines, big money, and back room deals" in our politics, not more. There is no justification whatsoever for government officials abusing their powers, stopping emergency vehicles and risking lives, making kids late for school and parents late for their jobs to retaliate against a mayor who withholds an election endorsement. We vote in our democracy to make government work, not break. We expect that officials will serve the public, not their personal interests. This conduct weakens our democracy, not strengthens it.

It is also incorrect that, as Jon suggests, reformers and transparency advocates are, in part, to blame for the gridlock that sometimes afflicts our American government at every level. As my co-authors and I demonstrated at some length in our recent Brookings paper, “Why Critics of Transparency Are Wrong,” and in our follow-up Op-Ed in the Washington Post, reform and transparency efforts are no more responsible for the current dysfunction in our democracy than they were for the gridlock in Fort Lee. Indeed, in both cases, “hacks, machines, big money, and back room deals” are a major cause of the dysfunction. The vicious cycle of special interests, campaign contributions and secrecy too often freeze our system into stasis, both on a grand scale, when special interests block needed legislation, and on a petty scale, as in Fort Lee. The power of megadonors has, for example, made dysfunction within the House Republican Caucus worse, not better.

Others will undoubtedly address Jon’s new paper at length. But one other point is worth noting now. As in foreign policy discussions, I don’t think Jon’s position merits the mantle of political “realism,” as if those who want democracy to be more democratic and less corrupt are fluffy-headed dreamers. It is the reformers who are the true realists. My co-authors and I in our paper stressed the importance of striking realistic, hard-headed balances, e.g. in discussing our non-absolutist approach to transparency; alas, Jon gives that the back of his hand, acknowledging our approach but discarding the substance to criticize our rhetoric as “radiat[ing] uncompromising moralism.” As Bridgegate shows, the reform movement’s “moralism" correctly recognizes the corrupting nature of power, and accordingly advocates reasonable checks and balances. That is what I call realism. So I will race Jon to the trademark office for who really deserves the title of realist!

The eurozone has three problems: national debt obligations that cannot be met, medium-term imbalances in trade competitiveness, and long-term structural flaws.

The short-run problem requires more of the monetary easing that Germany has, with appalling shortsightedness, been resisting, and less of the near-term fiscal restraint that Germany has, with equally appalling shortsightedness, been seeking. To insist that Greece meet all of its near-term current debt service obligations makes about as much sense as did French and British insistence that Germany honor its reparations obligations after World War I. The latter could not be and were not honored. The former cannot and will not be honored either.

The medium-term problem is that, given a single currency, labor costs are too high in Greece and too low in Germany and some other northern European countries. Because adjustments in currency values cannot correct these imbalances, differences in growth of wages must do the job—either wage deflation and continued depression in Greece and other peripheral countries, wage inflation in Germany, or both. The former is a recipe for intense and sustained misery. The latter, however politically improbable it may now seem, is the better alternative.

The long-term problem is that the eurozone lacks the fiscal transfer mechanisms necessary to soften the effects of competitiveness imbalances while other forms of adjustment take effect. This lack places extraordinary demands on the willingness of individual nations to undertake internal policies to reduce such imbalances. Until such fiscal transfer mechanisms are created, crises such as the current one are bound to recur.

Present circumstances call for a combination of short-term expansionary policies that have to be led or accepted by the surplus nations, notably Germany, who will also have to recognize and accept that not all Greek debts will be paid or that debt service payments will not be made on time and at originally negotiated interest rates. The price for those concessions will be a current and credible commitment eventually to restore and maintain fiscal balance by the peripheral countries, notably Greece.

If you’re reading this article, chances are you know people who are still getting married. But it’s getting rarer, especially among the youngest generation and those who are less educated. We used to assume people would marry before having children. But marriage is no longer the norm. Half of all children born to women under 30 are born out of wedlock. The proportion is even higher among those without a college degree.

What’s going on here? Most of today’s young adults don’t feel ready to marry in their early 20s. Many have not completed their educations; others are trying to get established in a career; and many grew up with parents who divorced and are reluctant to make a commitment or take the risks associated with a legally binding tie.

But these young people are still involved in romantic relationships. And yes, they are having sex. Any stigma associated with premarital sex disappeared a long time ago, and with sex freely available, there’s even less reason to bother with tying the knot. The result: a lot of drifting into unplanned pregnancies and births to unmarried women and their partners with the biggest problems now concentrated among those in their 20s rather than in their teens. (The teen birth rate has actually declined since the early 1990s.)

Does all of this matter? In a word, yes.

These trends are not good for the young people involved and they are especially problematic for the many children being born outside marriage. The parents may be living together at the time of the child’s birth but these cohabiting relationships are highly unstable. Most will have split before the child is age 5.

Social scientists who have studied the resulting growth of single-parent families have shown that the children in these families don’t fare as well as children raised in two-parent families. They are four or five times as likely to be poor; they do less well in school; and they are more likely to engage in risky behaviors as adolescents. Taxpayers end up footing the bill for the social assistance that many of these families need.

Is there any way to restore marriage to its formerly privileged position as the best way to raise children? No one knows. The fact that well-educated young adults are still marrying is a positive sign and a reason for hope. On the other hand, the decline in marriage and rise in single parenthood has been dramatic and the economic and cultural transformations behind these trends may be difficult to reverse.

Women are no longer economically dependent on men, jobs have dried up for working-class men, and unwed parenthood is no longer especially stigmatized. The proportion of children raised in single-parent homes has, as a consequence, risen from 5 percent in 1960 to about 30 percent now.

Conservatives have called for the restoration of marriage as the best way to reduce poverty and other social ills. However, they have not figured out how to do this.

The George W. Bush administration funded a series of marriage education programs that failed to move the needle in any significant way. The Clinton administration reformed welfare to require work and thus reduced any incentive welfare might have had in encouraging unwed childbearing. The retreat from marriage has continued despite these efforts. We are stuck with a problem that has no clear governmental solution, although religious and civic organizations can still play a positive role.

But perhaps the issue isn’t just marriage. What may matter even more than marriage is creating stable and committed relationships between two mature adults who want and are ready to be parents before having children. That means reducing the very large fraction of births to young unmarried adults that occur before these young people say they are ready for parenthood.

Among single women under the age of 30, 73 percent of all pregnancies are, according to the woman herself, either unwanted or badly mistimed. Some of these women will go on to have an abortion but 60 percent of all of the babies born to this group are unplanned.

As I argue in my book, “Generation Unbound,” we need to combine new cultural messages about the importance of committed relationships and purposeful childbearing with new ways of helping young adults avoid accidental pregnancies. The good news here is that new forms of long-acting but fully reversible contraception, such as the IUD and the implant, when made available to young women at no cost and with good counseling on their effectiveness and safety, have led to dramatic declines in unplanned pregnancies. Initiatives in the states of Colorado and Iowa, and in St. Louis have shown what can be accomplished on this front.

Would greater access to the most effective forms of birth control move the needle on marriage? Quite possibly. Unencumbered with children from prior relationships and with greater education and earning ability, young women and men would be in a better position to marry. And even if they fail to marry, they will be better parents.

My conclusion: marriage is in trouble and, however desirable, will be difficult to restore. But we can at least ensure that casual relationships outside of marriage don’t produce children before their biological parents are ready to take on one of the most difficult social tasks any of us ever undertakes: raising a child. Accidents happen; a child shouldn’t be one of them.

We have known for some time that children who grow up in single parent-families do not fare as well as those with two parents – especially two biological parents.  In recent years, some scholars have argued that the consequences are especially serious for boys.  Not only do boys need fathers, presumably to learn how to become men and how to control their often unruly temperaments, but less obviously, and almost counterintuitively, it turns out that boys are more sensitive or less resilient than girls. Parenting seems to affect the development of boys more than it affects the development of girls.  Specifically, their home environment is more likely to affect behavior and performance in school.

Up until now, these speculations have been based on limited evidence.  But new research from Harvard professor Raj Chetty and a team of colleagues shows that the effects of single parenthood are indeed real for all boys, regardless of family income, but especially for boys living in high-poverty, largely minority neighborhoods.

When they become adults, boys from low-income, single-parent families are less likely to work, to earn a decent income, and to go to college: not just in absolute terms, but compared to their sisters or other girls who grew up in similar circumstances.  These effects are largest when the families live in metropolitan areas (commuting zones) with a high fraction of black residents, high levels of racial and income segregation, and lots of single-parent families.  In short, it is not just the boy’s own family situation that matters but also the kind of neighborhood he grows up in.  Exposure to high rates of crime, and other potentially toxic peer influences without the constraining influence of adult males within these families, seems to set these boys on a very different course than other boys and, perhaps more surprisingly, on a different course from their sisters.

The focus of a great deal of attention recently has been on police practices in low-income minority neighborhoods.  Without in any way excusing police brutality where it has occurred, what this research suggests is that the challenge for police is heightened by the absence of male authority figures in low-income black neighborhoods.  In his gripping account of his own coming of age in West Baltimore, journalist Ta-Nehisi Coates recounts being severely punished by his father for some adolescent infraction.  When his mother protested, Ta-Nehisi’s father replied that it was better that this discipline come from within the family than be left to the police.  But Coates’ family was one of the few in his neighborhood where a father still existed.

Repairing families is difficult at best.  Most single-parent families are initially formed as the result of an unplanned birth to an unmarried young woman in these same communities.  Perhaps girls and young women simply suffer in a different way.  Instead of becoming involved in crime and ending up in prison or the informal economy, they are more likely to drift into early motherhood.  With family responsibilities at an early age, and less welfare assistance than in the past, they are also more likely to have to work.  But in the longer run, providing more education and a different future for these young women may actually be just as important as helping their brothers if we don’t want to perpetuate the father absence that caused these problems in the first place.  They are going to need both the motivation (access to education and decent jobs) and the means (access to better forms of contraception) if we are to achieve this goal.

Editor's note: This piece originally appeared in Real Clear Markets.