Cultural Darwinian adaptations not _random_ , but caused by, the adaptive problem they solve

Dear Maria,

Preparing for class to  discuss the conflict between the theory of inheritance of acquired characteristics and the theory of random genetic mutation I thought :

1) Darwin had a) no theory of the cause of variety in a species b) no theory of _how_ characteristics are inherited, 

2) Darwin had no conflict with LaMarck on inheritance because Darwin didn't have one . Actually, I don't know that LaMarck had much of one either. 
3) Darwin had no variety theory either so no conflict with LaMarck's explanation of variety.

4) Furthermore, LaMarck's was a natural selection theory !  In his famous giraffe example, the giraffes that stretch their necks are selected for by their environment ; stretching the neck is an adaptation . 

Inheritance of acquired characteristics conflicts with random genetic mutation , discovered post Darwin. 

Culture as inheritance ( in brain cells, language and memory, instead of gamete cells) of acquired characteristics (not body cells , but extra-somatically , in objective reality) is more efficient adaptive process than genetic mutations that occur randomly relative to the adaptive problem they solve. Because, cultural inventions (acquired by one generation and passed on to the next) are caused by the adaptive problem they solve and do not arise randomly relative to the adaptive problem they solve. 

Thus, there is the population expansion of homo erectus and then Homo sapiens out of Africa with the origin of culture in the Stone Age. 

Maybe ? 

Charles