<P> Economic anthropologist Duran Bell has criticized the legitimacy - based definition on the basis that some societies do not require marriage for legitimacy . He argued that a legitimacy - based definition of marriage is circular in societies where illegitimacy has no other legal or social implications for a child other than the mother being unmarried . </P> <P> Edmund Leach criticized Gough's definition for being too restrictive in terms of recognized legitimate offspring and suggested that marriage be viewed in terms of the different types of rights it serves to establish . In 1955 article in Man, Leach argued that no one definition of marriage applied to all cultures . He offered a list of ten rights associated with marriage, including sexual monopoly and rights with respect to children, with specific rights differing across cultures . Those rights, according to Leach, included: </P> <Ol> <Li> "To establish a legal father of a woman's children . </Li> <Li> To establish a legal mother of a man's children . </Li> <Li> To give the husband a monopoly in the wife's sexuality . </Li> <Li> To give the wife a monopoly in the husband's sexuality . </Li> <Li> To give the husband partial or monopolistic rights to the wife's domestic and other labour services . </Li> <Li> To give the wife partial or monopolistic rights to the husband's domestic and other labour services . </Li> <Li> To give the husband partial or total control over property belonging or potentially accruing to the wife . </Li> <Li> To give the wife partial or total control over property belonging or potentially accruing to the husband . </Li> <Li> To establish a joint fund of property--a partnership--for the benefit of the children of the marriage . </Li> <Li> To establish a socially significant' relationship of affinity' between the husband and his wife's brothers ." </Li> </Ol> <Li> "To establish a legal father of a woman's children . </Li>

When did love become a part of marriage