dropped to a much lower level: that is to say, the great bulk of ontogenetic 

 expansion of the brain was delayed until after birth, when it ensued with 

 dramatic suddenness. In other words, Natural Selection operated in favor 

 of variants showing belated brain expansion— and in this way, the biological 

 equipment was brought into line with the hungry demands of the positive 

 feedback system. 



149 £ 



