Theory goes, left-handers have an advantage in battle (everyone has fought and trained against a right hander). Those that won, and had good political skills go

Theory goes, left-handers have an advantage in battle (everyone has fought and trained against a right hander). Those that won, and had good political skills got to rule (and remain ruling) and reproduce, so it was self selecting for leadership. What is odd about that theory is our almost static percentage of the population thru the ages.