For a group of autonomous agents to coexist in a limited space,
they need to behave in a coherent manner.
For that coexistence to survive in the long run,
those agents need to behave cohesively.
To maintain their autonomy while bearing in mind
the limited nature of the space in which they need to do their thing.

Riding bumper cars is great fun!
But have you tried to get anywhere driving like that on a real road?