105 (CASTLE summer book club update)

In this excerpt from “Playful,” Cas Holman surveys the research that brought the neuroscience of play into the mainstream.

In “Warhead,” neuroscientist and national security adviser Nicholas Wright explains how the brain navigates warfare and why it is our ultimate weapon (and instrument for peace).

Bold megaprojects could turn dry depressions into thriving new hubs of life.

If you feel like you’re missing out on something bigger, you might be feeling saṃvega.

The marketing guru outlines the current state of brand-building — and highlights four outstanding opportunities for the immediate future.