New Divide

You shall need to have to have faith in Darwin and Hugo de Vries theory of evolution to understand the argument below.
The idea of the optimal cycles of adversity is essential for an ideal development and evolution as the selection and accumulation of genetic diversity better happen when each is individually enforced.
The bird who made its nest on the highest branch was more successful on conveying its progeny. The height had to be optimal to be away from predators but not too unstable in the wind, its progeny were further selected for smartness not to go back on the lower branches. But the new talent was not physical but a group of simple smartness and logics, as to know where to nest, choosing the right tree and branch. How exactly to place the egg in the nest so that it is warmest and does not fall prey to animals and gravity. Hence not very difficult to imagine that the female intelligence is the guiding principle of intellectual development, it was the female who was responsible for choosing the right male to mate with. Her choice here was critical for feeding of the newborns and security from the other animals and building the best nest. The physical development though better seen in males as the site of expression is selected by females.
Not just in macroscopic scale but the ability of one sperm to enter the ova where thousands are around, again the female system chooses one. Contrary to popular opinion this is not first come first serve. Many woman are known to have an statistically significant difference in number of male or female offsprings; this can be explained by the ova selection where probably the pellucida has an ability to prefer a sect of sperms. and also explains the possible reason why despite a significant difference in Male chromatin, the Y sperms are not exactly able to make the best of the lighter weight.
This indicates that the male intelligence is just a genetic trait it shares with the females, merely as a carries of information. True selection works in the female mind and body.