We would do well to remember the costs of keeping quiet.

The U.S. government has enlisted powerful informants in the past without difficulty. Here's why.

Elites have always used a climate of fear to push their own agendas.

It takes a whole society to create an atmosphere of fear: elites and collaborators, bystanders and victims alike.

A decade ago, few Americans were interested in the risks dissidents face. Trump has changed that.

Scientists have discovered a radical new way to treat our most traumatic memories.