Creating rules around the content we consume can help calm our overtaxed brains and manage our moods.

The social psychologist Jonathan Haidt discusses the “parents’ revolution” on smartphones that his book “The Anxious Generation” has started.

Readers respond to President Trump’s orders that disrupt the V.A.’s ability to provide care. Also: Saving species; AI and human creativity.

Andrew Cuomo’s ideas for fighting subway crime plan aren’t new, but that doesn’t matter.