When the Soviet Union collapsed in the early 1990s, it seemed possible to many in the West that the United States would lead the world into a new era of universal liberal democracy. But in 2001, the September 11 attacks by the terrorist group al-Qaeda prompted the United States to begin wars in...

By the 1990s, computers had become commonplace in developed countries, though fears about their potential impact on privacy grew with the rise of the internet and social media. Easy access to social media over smartphones helped young protestors in Tunisia and Egypt organize to challenge their...

In the 1950s and 1960s, some in developed countries began responding openly to the environmental problems they saw around them, including those caused by the Green Revolution. Scientists like Rachel Carson, author of Silent Spring, gave legitimacy to these concerns, and many people became...