When the topic is growing income inequality, it's hard to prettify an imbalance between the rich and everybody else, so instead, conservatives try to argue that it doesn't exist.

There's a growing consensus that the best way to defeat communism in Cuba is to get its citizens hooked on American goods.

The pathological degree to which former Vice President Dick Cheney operated in secrecy led to government abuses that we'll probably spend years learning about.

The advantage of a market-based national defense is obvious: Every citizen would receive an individualized amount of military protection, based on the value each of us placed on defending the homeland.

The continued existence of wildlife and wilderness is important to the quality of life of humans.

Through space-based climate studies, my colleagues and I have learned that a stable and comfortable climate is not something to take for granted.

In addition to deep divisions on issues such as trade, climate change, Middle East peace and nuclear weapons, Trump's attacks on leaders such as Trudeau and Merkel and disrespect for NATO and other institutions are prompting a reassessment by allied governments and publics.

Pollution from human activities is changing the Earth's climate. We see the damage that a disrupted climate can do: on our coasts, our farms, forests, mountains, and cities. Those impacts will grow more severe unless we start reducing global warming pollution now.