The international rule of law is often seen as a centerpiece of the modern international order. It is routinely reaffirmed by governments, international organizations, scholars, and activists, who credit it with reducing the recourse to war, preserving human rights, and constraining (albeit imperfectly) the pursuit of state self-interests. It is commonly seen as supplanting coercion and power politics with a framework of mutual interests that is cemented by state consent.

Too much of the debate about how respect for human rights can be advanced on a global basis currently revolves around crisis situations involving so-called mass atrocity crimes and the possibility of addressing abuse through the use of military force. This preoccupation, as understandable as it is, serves to mask much harder questions of how to deal with what might be termed silent and continuous atrocities, such as gross forms of gender or ethnic discrimination or systemic police violence, in ways that are achievable, effective, and sustainable. This more prosaic but ultimately more important quest is often left to, or perhaps expropriated by, international lawyers. Where the politician often finds solace in the deployment of military force, the international lawyer turns instinctively to the creation of a new mechanism of some sort. Those of modest inclination might opt for a committee or perhaps an inquiry procedure. The more ambitious, however, might advocate the establishment of a whole new court. And surely the most “visionary” of such proposals is one calling for the creation of a World Court of Human Rights. A version of this idea was put forward in the 1940s, but garnered no support. The idea has now been revived, in great detail, and with untrammeled ambition, under the auspices of an eminent group of international human rights law specialists.

Perhaps the most influential passage on the rule of law in international law comes from chapter 13 of Thomas Hobbes's Leviathan. In the course of describing the miserable condition of mankind in the state of nature, Hobbes remarks to readers who might be skeptical that such a state ever existed that they need only look to international relations—the relations between independent states—to observe one:

Like people born shortly after World War II, the international human rights movement recently had its sixty-fifth birthday. This could mean that retirement is at hand and that death will come in a few decades. After all, the formulations of human rights that activists, lawyers, and politicians use today mostly derive from the UN Universal Declaration of Human Rights, and the world in 1948 was very different from our world today: the cold war was about to break out, communism was a strong and optimistic political force in an expansionist phase, and Western Europe was still recovering from the war. The struggle against entrenched racism and sexism had only just begun, decolonization was in its early stages, and Asia was still poor (Japan was under military reconstruction, and Mao's heavy-handed revolution in China was still in the future). Labor unions were strong in the industrialized world, and the movement of women into work outside the home and farm was in its early stages. Farming was less technological and usually on a smaller scale, the environmental movement had not yet flowered, and human-caused climate change was present but unrecognized. Personal computers and social networking were decades away, and Earth's human population was well under three billion.

In his definitive book A Perfect Moral Storm, ethicist Stephen Gardiner argues that the way forward in a climate-changed world is so difficult in part because we “do not yet have a good understanding of many of the ethical issues at stake in global-warming policy.” We remain confused about such vital questions as who should take responsibility for the current condition, how to preserve equity between generations, and how best to think about our responsibility toward nonhuman animals. The resistance of governments to taking action, attempts by various players to throw sand in the eyes of the public, and specious arguments used to justify an unwillingness to do what is necessary all add to our moral bafflement.

Climate change will have highly significant and largely negative effects on human societies into the foreseeable future, effects that are already generating ethical and policy dilemmas of unprecedented scope, scale, and complexity. One important group of ethical and policy issues raised here concerns what I call environmental values. By this I do not mean the impact that climate change will have on the environment as a valuable human resource, nor am I referring to the changing climate as a threat to humans in terms of floods, storms, and droughts, important as these are. Rather, I am concerned with the way climate change—and the policies that may be adopted to respond to it—threatens both things we value and, potentially, some of our environmental values themselves.

When international relations scholars think about international law they either ignore culture or offer highly deterministic accounts of its role. For the majority of scholars, international law is a rational construction, an institutional solution to the problem of order in an anarchical system, a body of rules and practices that reflect the contending interests and capabilities of major states. Issues of culture barely rate a mention. For others, culture is the deep foundation of international law, the structuring “mentality” that gives law its form and content. International law, from this perspective, is a Western cultural artifact, globalized through centuries of imperialism and hegemony. These contrasting views lead to different expectations about the future of international law in today's culturally diverse international order. For rationalists, law's fate will be determined by the shifting configuration of interests that accompany new functional challenges and great power transitions. For the more culturally attuned, there are two possibilities. One is that functional utility will replace culture as law's foundation. International law may well be a Western cultural artifact, but “rational buy-in” will sustain it in a multicultural world. The other, more pessimistic, expectation is that the rule of international law will be fundamentally undermined by cultural diversity, particularly as rising non-Western powers articulate and promote markedly different cultural norms and values.

I am skeptical of our ability to predict, or even forecast, the future—of human rights or any other important social practice. Nonetheless, an understanding of the paths that have brought us to where we are today can facilitate thinking about the future. Thus, I approach the topic by examining the reshaping of international ideas and practices of state sovereignty and human rights since the end of World War II. I argue that in the initial decades after the war, international society constructed an absolutist conception of exclusive territorial jurisdiction that was fundamentally antagonistic to international human rights. At the same time, though, human rights were for the first time included among the fundamental norms of international society. And over the past two decades, dominant understandings of sovereignty have become less absolutist and more human rights–friendly, a trend that I suggest is likely to continue to develop, modestly, in the coming years.

Many in the environmental movement have argued in recent years that in order to speed up climate actions we should take the ethics out of the climate change debate. Focusing on the moral obligation to act or on the effects of climate change on the most vulnerable was often judged to render the discourse too “heavy,” “negative,” or “difficult.” Many also deemed it unnecessary. After all, renewable energies, better designed cities that allow for reduced car use, and power plant regulations that lead to cleaner local air—to take just three examples—all have real and substantial benefits unrelated to the fact that they are “the right thing to do” in the face of climate change. They create jobs, reduce health problems and costs, and make society fitter.

The international rule of law hinges on the existence of a shared lexicon accepted by states and other actors in the international system. With no independent judicial system capable of determining (and enforcing) the meaning of words and concepts, states must develop shared interpretations of the law and the concepts and terms it relies on, and be willing (mostly) to abide by those shared interpretations. When such shared interpretations exist, key aspects of the rule of law can be present even in the absence of an international judicial system; state behavior can be reasonably predictable, nonarbitrary, and transparent; and accountability can also be possible, albeit mainly through nonjudicial mechanisms.

Ever since the Charter of the United Nations was signed in 1945, human rights have constituted one of its three pillars, along with peace and development. As noted in a dictum coined during the World Summit of 2005: “There can be no peace without development, no development without peace, and neither without respect for human rights.” But while progress has been made in all three domains, it is with respect to human rights that the organization's performance has experienced some of its greatest shortcomings. Not coincidentally, the human rights pillar receives only a fraction of the resources enjoyed by the other two—a mere 3 percent of the general budget.

Thomas Piketty's Capital in the Twenty-First Century is a tour de force—a compelling and accessible read that presents an eloquent and convincing warning about the future of capitalism. Capitalism, Piketty argues, suffers from an inherent tendency to generate an explosive spiral of increasing inequality of wealth and income. This inegalitarian dynamic of capitalism is not due to textbook failures of capitalist markets (for example, natural monopolies) or failures of economic institutions (such as the failure to regulate these monopolies), but to the way capitalism fundamentally works. Unless the spiral is controlled by far more progressive taxation than is now the norm, the political fallout could undermine the viability of the successful “social state” (p. 471) in the advanced economies, putting the democratic state itself at risk.

One of the fundamental challenges of climate change is that we contribute to it increment by increment, and experience it increment by increment after a considerable time lag. As a consequence, it is very difficult to see what we are doing to ourselves, to future generations, and to the living planet as a whole. There are monumental ethical issues involved, but they are obscured by the incremental nature of the process and the long time frame before reaching the concentration of greenhouse gases and the ensuing accumulation of radiant heat—and consequent climate change—that ensues.

Sovereignty apparently never ceases to attract scholarly attention. Long gone are the days when its meaning was uncontested and its essential attributes could be safely taken for granted by international theorists. During the past decades international relations scholars have increasingly emphasized the historical contingency of sovereignty and the mutability of its corresponding institutions and practices, yet these accounts have been limited to the changing meaning and function of sovereignty within the international system. This focus has served to reinforce some of the most persistent myths about the origin of sovereignty, and has obscured questions about the diffusion of sovereignty outside the European context.

Whence does international law derive its normative force as law in a world that remains, in many respects, one where legitimate politics is practiced primarily at the national level? As with domestically focused legal theories, one standard answer is positivistic: the law's authority is based on its origin in agreed procedures of consent. This is certainly plausible with respect to treaty obligations and commitments that derive from the United Nations Charter, but it leaves customary international law vulnerable to legitimacy critiques—of which there is no shortage among international law skeptics. Even with respect to conventional international norms, such as treaty provisions, there is often a sense that such consent is democratically thinner than the public consent to domestic law, particularly fundamental domestic law, constitutional norms, and derivative principles of legitimate governance. State consent in international law, in this view, is often a very imperfect proxy for democratic consent to international legal norms. While it is obvious to international lawyers why (as a matter of positive law doctrine) state consent should make international norms prevail over domestic norms to which there is arguably deeper democratic consent, persistent critics of international law have questioned whether this should be so as a matter of legitimacy.