The best, most successful managers in the modern era are those who can keep a player happy even if he is not in the team. Given the size of the squads and the use of rotation nowadays, that's tougher than it's ever been. ↗
I go where the material is, and I feel like I'm looking for really strong directors. That's the key ingredient. There are some directors I would move the sun and earth for, or stop the rotation of the planets, just to work with them. ↗
It does not seem, however, that organic chemists were much worried about barriers to rotation in organic molecules in general at that time because there was no technique available to demonstrate the phenomenon experimentally. ↗