"In a great many civilizations, at least until present era, marriages were arranged in the interests of kinship networks, not at the whim of lovers"(Adrian Brune)
             Procreation, the goal nature wants to achieve with this union, is the basic factor and the only reason, which has transformed co-habitation into marriage, and raised it from mere carnal relation to a durable union. The reality of the sexual relation between a man and women is most obviously established by human, or even, animal nature. In the animal world, it is seen that two species join together to raise offspring by giving it shelter food and protection. In doing this it is necessary that the male and female cooperate together, usually the male provides the protection, and the females provides the shelter and food, also seen as nurture which is essential in the life cycle. In the animal world, the male and female sometimes split after the offspring is ready to be on its own, but as humans, the male and female usually stay together, and engage in marriage. In relation to the animal world, it is quite possible to say that humans are not much different, humans just give a name to this process called matrimony. The real rational for this marriage process is the instinct of procreation and bringing up the children. On the other side of marriage, sexual urges, earning and saving money, and obtaining households, these are not part of the goal of nature, they are just benefits accruing from marriage. Marriage in essence goes against the laws of nature, leads more towards culture. Humans live in a world ruled more by culture and less by natures. Only in the depths of the jungle will you find a tribe lead by nature, a tribe in which its main purpose is to procreate and continue the human species.
             In the beginning marriage was seen mostly as a way to procreate. It had not strayed away from the nature form it was meant to be. Now marriage has "evolved" to some...