1. This odd reversal of polygyny has been attributed to a very high rate of ground predation whereby clutches are easily lost.

2. Men live in polygyny, while women in polyandry.

3. But to allow polygyny but not polyandry would be to discriminate against women.

4. Monogyny and polygyny which people scrupulously abide by nowadays have a history of only several thousand years.

5. However, polygyny itself is not a sufficient cause of suicide bombing.

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6. It was polygyny that accounts for human females'general longevity over males.

7. So polygyny increases competitive pressure on men, especially young men of low status.

8. McLennan knew only three forms of marriage: polygyny, polyandry and monogamy.

9. Polygyny - A mating system in which males mate several females.

10. Might that be one small reason among many larger ones explaining why polygyny has been much more common than polyandry?

11. What distinguishes Islam from other major religions is that it tolerates polygyny.

12. Men in monogamous societies imagine they would be better off under polygyny.