The consequences of Quebec pulling out of the Canadian Federal state are unknown but could be quite disruptive of social and economic norms in the entire region. Humans display sexual dimorphism with the male tending to be somewhat larger and stronger with a higher center of gravity, females are smaller with a lower center of gravity. Sexual dimorphism in other mammalian species is linked to mating behavior, with the largest difference in morphology among species in which the male is the most sexually promiscuous. Species such as the elk and some of the seals are characterized by males fighting for harems of females. The largest and fiercest males are able to reproduce very successfully, while the smaller or more timid ones find no opportunities for mating.
Evolutionary ecologists think that humans evolved dimorphism for similar reasons.
Inclusive fitness is a relative measure of the number of healthy grandchildren an individual leaves behind. Females can experience a limited number of pregnancies during their lifetime, and each occurs at great personal cost in both time and food energy expenditure. The basic strategy for a female then, is to assure that the children she bears are healthy and survive to adulthood. She can best do this by carefully selecting a quality mate who will not only father good children, but continue to support the family during good times and bad. Males can maximize their inclusive fitness by a strategy of continuing to seek additional mating opportunities.