Roughly stmation according to my own model of DNA-protein network interaction (which can take cues from the environment and react to it): 1 %

30 % is fixed by the plasticity in your brain which is fixed by the social interaction (mostly when you are a little kid...but you can change it).

15 % is just pure luck.. people that you happen to know, interactions that you happen to have....bad/good things that happen to happen...new ideas that happen to help you change your vision of happiness .. and the world..

Sorry...

A pleasure

I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude