We are all born with all 8 Instincts.

Some of us act primarily out of one Instinct.
Some of us act out of a combination of 2 or more Instincts,
like Gathering and Worker.

In order for our species to survive, we need:

3% acting mostly out of Inventor Instinct

7% acting mostly out of Hunting Instinct

18% acting mostly out of Warrior Instinct

24% acting mostly out of Nurturing Instinct

48% acting mostly out of Worker/Gathering Instinct combination.

We also need 14% of everybody
to act out of Mating Instinct
and be willing to mate with whoever is available.

For many thousands of years we wandered in bands of 25 to 50.
This means we would have been related to most of our group.
If no one was willing to mate with whoever was available,
we would have become extinct long ago.

Have you ever noticed
that we don't have villages
where there are 200 plumbers,
but no one wants to be a barber.

Why?

The random, yet consistent
distribution of our Instincts
at birth ensures we have
exactly what we need
to survive as a species.