You really want to know your cofounders for a while, ideally years.

... but the pendulum has swung way out of whack here. A bad idea is still bad, and the pivot happy world we're in today feels suboptimal.

A lot of people treat choosing their cofounder with even less importance than they put on hiring. Don't do this.

If someone is choosing between joining McKinsey or your startup it's very unlikely they're going to work out at the startup.

Why now, why is this the perfect time for this particular idea, and to start this particular company?

Growth solves (nearly) all problems

Great execution is at least 10 times more important and a 100 times harder than a good idea.