“When nations and peoples allow themselves to be defined by their differences, the gulf between them widens. When we fail to pursue peace, then it stays forever beyond our grasp. We know the path when we choose fear over hope. To denounce or shrug off a call for cooperation is an easy but also a cowardly thing to do. That's how wars begin. That's where human progress ends.”

2014, Address to the United Nations (September 2014)

Source: The Clash of Civilizations and the Remaking of World Order (1996), Ch. 1: The New Era in World Politics, § 2 : A Multipolar, Multicivilizational World
Context: In the post-Cold War world, for the first time in history, global politics has become multipolar and multicivilizational. During most of human existence, contacts between civilizations were intermittent or nonexistent. Then, with the beginning of the modern era, about A. D. 1500, global politics assumed two dimensions. For over four hundred years, the nation states of the West — Britain, France, Spain, Austria, Prussia, Germany, the United States, and others — constituted a multipolar international system within Western civilization and interacted, competed, and fought wars with each other. At the same time, Western nations also expanded, conquered, colonized, or decisively influenced every other civilization. During the Cold War global politics became bipolar and the world was divided into three parts. A group of mostly wealthy and democratic societies, led by the United States, was engaged in a pervasive ideological, political, economic, and, at times, military competition with a group of somewhat poorer communist societies associated with and led by the Soviet Union. Much of this conflict occurred in the Third World outside these two camps, composed of countries which often were poor, lacked political stability, were recently independent, and claimed to be nonaligned.
In the late 1980s the communist world collapsed, and the Cold War international system became history. In the post-Cold War world, the most important distinctions among peoples are not ideological, political, or economic. They are cultural. Peoples and nations are attempting to answer the most basic question humans can face: Who are we? And they are answering that question in the traditional way human beings have answered it, by reference to the things that mean most to them. People define themselves in terms of ancestry, religion, language, history, values, customs, and institutions. They identify with cultural groups: tribes, ethnic groups, religious communities, nations, and, at the broadest level, civilizations. People use politics not just to advance their interests but also to define their identity. We know who we are only when we know who we are not and often only when we know whom we are against.
Nation states remain the principal actors in world affairs. Their behavior is shaped as in the past by the pursuit of power and wealth, but it is also shaped by cultural preferences, commonalities, and differences. The most important groupings of states are no longer the three blocs of the Cold War but rather the world’s seven or eight major civilizations. Non-Western societies, particularly in East Asia, are developing their economic wealth and creating the basis for enhanced military power and political influence. As their power and self-confidence increase, non-Western societies increasingly assert their own cultural values and reject those “imposed” on them by the West.

"I shit on all the revolutionary vanguards of this planet" http://www.csuchico.edu/zapatist/HTML/Archive/Communiques/etaJAN.html January, 2003

Academy of Achievement interview (2006)

2015, Remarks to the Kenyan People (July 2015)

Twenty Year Vision for America (2004)
Context: As with science and technology, there could be a dark side of globalization, in which progress for some means poverty for others, as jobs and opportunities ebb and flow, securities and currencies fluctuate in value, and the tension between private profit and public good persists. But surely these are risks that we can manage in a world with an America more attuned to its larger purpose and responsibilities.
The final frontier is perhaps the most difficult, but it's also the most important — and that's the frontier of the human spirit. For too long, people have allowed differences on the surface — differences of color, ethnicity, and gender — to tear apart the common bonds they share. And the human spirit suffers as a result.
Imagine a world in which we saw beyond the lines that divide us, and celebrated our differences, instead of hiding from them. Imagine a world in which we finally recognized that, fundamentally, we are all the same. And imagine if we allowed that new understanding to build relations between people and between nations.
Our goal for the next twenty years should be to finally recognize that our differences are our greatest strength. That's true not only here in America, but in all parts of the world, where we've allowed historic rifts to poison the well of opportunity. They've arisen from the natural prides and passion of humanity. Only when we recognize that — when we respect the human spirit — will we be a great nation and a great world. These are the steps we must take in the next twenty years, as we reach out for the newest frontiers.

Sydney, (22 January 2017)[citation needed].