In some societies a man may marry several wives. Western society allows this in a different way, in what is sometimes called “serial polygamy” – a man may marry several wives so long as he legally divorces the current one before marrying the next.

Arguably, the “Christian” form of polygamy is a more primitive and callous arrangement for the man’s existing family than ordinary polygamy. In polygamous societies, the first wife and their children remain viable parts of a viable social entity… In serial polygamy the children are brought up in a broken home, the wife is discarded in a difficult social position.

Understanding Human Behavior
Human Relationships: Man & His Women, Vol. 4, p. 438