History of Weddings:

Although the institution of marriage pre-dates reliable recorded history, many cultures have legends concerning the origins of marriage. The way in which a marriage is conducted and its rules and ramifications has changed over time, as has the institution itself, depending on the culture or demographic of the time.

One of the oldest known and recorded marriage laws is discerned from Hammurabi's Code, enacted in ancient Mesopotamia (widely considered as the cradle of civilization). Various cultures have had their own theories on the origin of marriage. One example may lie in a man's need for assurance as to paternity of his children. He might therefore be willing to pay a bride price or provide for a woman in exchange for exclusive sexual access.

Legitimacy is the consequence of this transaction rather than its motivation. In Comanche society, married women work harder, lose sexual freedom, and do not seem to obtain any benefit from marriage.[16] But nubile women are a source of jealousy and strife in the tribe, so they are given little choice other than to get married. "In almost all societies, access to women is institutionalized in some way so as to moderate the intensity of this competition."

In English common law, a marriage was a voluntary contract by a man and a woman, in which by agreement they choose to become husband and wife.[18] Edvard Westermarck proposed that "the institution of marriage has probably developed out of a primeval habit".

Forms of group marriage which involve more than one member of each sex, and therefore are not either polygyny or polyandry, have existed in history. However, these forms of marriage are extremely rare. Of the 250 societies reported by the American anthropologist George P. Murdock in 1949, only the Caingang of Brazil had any group marriages at all.