  Most of the mammal species hold polygynous mating systems. The majority of
the marriage systems of mankind were also polygynous over civilized history,
however, socially imposed monogamy gradually prevails throughout the world.
This is difficult to understand because those mostly influential in society are
themselves benefitted from polygyny. Actually, the puzzle of monogamous
marriage could be explained by a simple mechanism, which lies in the sexual
selection dynamics of civilized human societies, driven by wealth
redistribution. The discussions in this paper are mainly based on the approach
of social computing, with a combination of both experimental and analytical
analysis.
