As the presidential debate season opens, expect plenty of contrasts between how Hillary Clinton and Donald Trump view U.S. interactions in the world, writes CFR’s Elizabeth Saunders.

The Paris talks have been built up as a critical moment for confronting climate change, making even the perception of success important for momentum on lowering carbon emissions, writes CFR’s Michael…

The popularity of e-cigarettes presents an enormous opportunity for public health, which the United States is at risk of squandering by regulating these products as tobacco, writes CFR’s Thomas Bolly…

Syria’s civil war poses an expanding threat to the region and beyond. Washington should seize the opportunity that still exists to weaken the Assad regime, writes CFR’s Elliott Abrams.

Egypt’s Muslim Brotherhood needs to withdraw and reform if it’s to become a viable political force in the years ahead. CFR’s Ed Husain highlights a course for change.