Lastništvo orožja in evolucija

Okapi je 9. jul 2012 ob 14:02 izjavil:

To je pa seveda nekaj zelo drugega - tu primerja pse med seboj, ne pse in volkove. Razlike med pasmami psov, kolikor jih je, so mnogo manjše in precej verjetno je, da je v tem primeru vzgoja bistveno pomembnejši dejavnik od genetskih razlik med pasmami.

O.

Zato smo tudi ljudje v povprečju precej agresivni.

The downsizing of human brains is an evolutionary fact that took science writer Kathleen McAuliffe by surprise. "I said, 'What? I thought it was getting bigger!'" she tells NPR's Jacki Lyden. That was the story up to 20,000 years ago, she learned. Then, the brains of our ancestors reversed course and started getting smaller -- and they've been shrinking ever since.
...
Cro-Magnon man, who lived in Europe 20,000 to 30,000 years ago, had the biggest brains of any human species. In comparison, today's human brain is about 10 percent smaller.
...
"A smaller brain is the signature of selection against aggression," Hare tells Lyden. "Another way to say that is an increase in tolerance."
...
Hare says when a population selects against aggression, they can be considered to be domesticated.