姨太太Human habits and the institution of marriage from polygamy and polyandry to, from monogamy to polygamy, monogamy from the inevitable second-oriented polyandry.

From the perspective of biological degradation, polygamy led to a decline in human intelligence. The reason is: a woman is the cathode, the anode is a man, is the current human beings.

In life, only 5 of 100 people about high IQ, 5 and fool with disabilities, 90 general mediocrity. 100 women in the highest IQ of 5 women will not enter the ranks of the concubine;

Men in the highest IQ normally does not have the most wealth and the wealth of up to the owner of men in general is relatively high EQ and low IQ. 90 ordinary women and a 90, one of the production of male offspring, the group will be very low IQ.

At the same time, 5 excellent choice of only 5 women married men from a cross-section of human observation, such a system would result in decreased IQ.