In a world at risk, those attuned to the dangers can feel a powerful temptation to sound apocalyptic alarms to awaken the somnolent. Arousing fear, though, without offering a compelling vision of a better path, awakens only dispiriting anguish and despair. This pessimism is not so much wrong as disempowering. The basis for hope rests on two kinds of arguments, one scientific, the other historical. Quantitative simulation of alternative scenarios shows that sufficient environmental capacity and adequate technical means remain to reach a flourishing planetary civilization. Moreover, the precondition for this Great Transition is found in the shared risks and opportunities an interdependent global system now confronts. In our historical moment, the world has become a single community of fate, the foundation for cultural and institutional transformation. Although catastrophic premonitions cannot be logically refuted, they can be defied in spirit and negated in practice: pragmatic hope is the antidote to dystopian despair.

How to change the world? Those concerned about the dangerous drift of global development are asking this question with increasing urgency. Dominant institutions have proved too timorous or too venal for meeting the environmental and social challenges of our time. Instead, an adequate response requires us to imagine the awakening of a new social actor: a coordinated global citizens movement (GCM) struggling on all fronts toward a just and sustainable planetary civilization. Existing civil society campaigns remain fragmented and therefore powerless to leverage holistic transformation. To create an alternative vision and effective strategy for realizing it, consciousness and action must rise to the level of a GCM. We propose a new organizing campaign with the explicit aim of catalyzing this historic agency. This effort would expand and diversify in a “widening circle,” adapting to changing circumstances as it evolves. From the onset, such a project must foster a politics of trust, committed to balancing unity and pluralism on the road to our common future.

We confront daunting twenty-first century challenges hobbled by twentieth century institutions. In a world ever more interdependent, deepening global-scale risks—climate change, financial instability, terrorism, to name a few—threaten the planetary commonweal, even the continuity of civilization. Yet coherent and timely responses lie beyond the grasp of our myopic and disputatious state-centric political order. Closing this perilous gap between obsolete geo-politics and emerging geo-realities delineates an urgent political endeavor: constructing a legitimate and effective system of world governance. Key steps on that path involve reforming the United Nations and nurturing new venues for the meaningful exercise of global citizenship.

The long-playing tragedy of the Israeli-Palestinian conflict spreads ripples of antagonism across the world stage. For the sake of the people of that troubled land and the larger project of creating a civilized global future, it must be resolved. Despite the legacy of violence and enmity, a vision of two independent and cooperative states remains feasible. A new process of negotiation and cooperation can establish the political foundations and encourage the mutual trust needed for reconciliation and sustained peace. Keys to success include sound strategic-principles, appropriate external actors, and a multi-pronged action agenda along the lines proposed here.

Adequate mitigation of the risks of climate change requires rapid displacement of fossil fuels with carbon-free energy sources. This imperative has prompted a growing chorus of energy analysts, policy makers, and industry advocates to press for a resurgence of nuclear energy. Even some environmentalists are urging reconsideration of the nuclear option, so long anathema to their own movement. Yet, with critical problems unsolved—safety and cost, waste storage, and nuclear weapons proliferation—nuclear power remains a deeply problematic response to the climate challenge, and to the wider challenge of global sustainability. Therefore, the transformative energy strategy of a Great Transition relies on three major prongs: renewable resources, deep efficiency, and a model of development based on environment-sparing consumption and production patterns.