What is the Evolutionary Advantage?

We have 5 fingers, not 4 or 6.

Starfish and Echindodermata, the other phylum in the deuterostomes, have pentaradial symmetry.

So I ask you, /sci/, what is the EVOLUTIONARY ADVANTAGE of five?

There are several obvious, opposing forces at work for selecting the number of fingers:

1. More fingers are useful for grasping things.  That increases your ability to survive and produce offspring.

2. More fingers snag, get injured, and lose heat.  That decreases your ability to survive and produce offspring.

When opposing forces meet, there is an equilibrium position.  That position for Humans is 5.