Savanna..

The dinner party is winding down.  Then one person who had a fine time — stands up, finds their coat, and goes. No lap of the room, no round of goodbyes, no fifteen-minute farewell in the doorway. They’re just gone.

 They’re actually three signs of a mind that gets to the end of the usual social scripts before everyone else does — and goes looking for the exit, or the window, or a better conversation, the moment there’s nothing left in them to chew on.

 The announcement that they’re off, the slow circuit of the room, the thank-yous, the doorway conversation that somehow runs longer than dinner did.
For the person who slips out, that’s a set of motions that adds nothing they need.

Researchers who followed more than 15,000 adults found something they didn’t expect: for most people, more time with friends went with a happier life but among the sharpest minds in the group, it ran the other way, and the ones who socialized most were often the least content.

The framework behind it, sometimes called the savanna theory of happiness, holds that a quicker, more self-directed mind leans less on its immediate social group and gets more out of time spent in its own head.