There is no such thing as an inheritance of capacity, talent, temperament, mental constitution and characteristics.
The past explains the present - that is the fundamental premise of evolutionary psychology.
The man who is fit to work at any particular trade is unable to understand the science of that trade without the kindly help and cooperation of men of a totally different type of education.
You put together two people who have not been put together before; and sometimes the world is changed, sometimes not. They may crash and burn, or they may set off a spark that will light the world.