[stcredzero]

Human beings don't come with specs you can evaluate to know whether or not they will help or hurt your mission.

You need to find people who can perceive the workings of the group and company as a system, then actively avoid pathologies and improve the group as a whole. Most groups aren't solely composed of such people, but the ones that work well have enough of them to regulate group interactions smoothly.

What makes hiring so hard is that it's a gamble.

It wouldn't be if there was a way that we could try people for a couple weeks, then six months before hiring. Almost anyone can pretend to be nice for 6 months for tens of thousands of dollars. Longer than that, you're either getting a genuine glimpse, or there's a darker talent at play.