Some say marriage was for procreation but that is totally untrue.
Facts About Marriage
1) Marriage was not necessary in order to pro-create; it was practiced as a type of social welfare to protect children by giving them parental and tribal identification thus holding both parents and tribes accountable for the offspring.
2) Marriage became a form of bartering, securing men their fortunes, property and power through the dowrys of wives or one rich wife.
3) Much later, the popular concept of love became the reason to marry.
4) Some, because of religious devotion (priests, monks and nuns) were forbidden to marry in the flesh. Slaves were originally forbidden to marry because they were property not people. The last 15 states were forced to end a law protecting ethnic heritage by allowing mixed couples to marry. That was on June 12th in 1967.
5) In America marriage is now limited to one husband and one wife with incest forbidden, once again to protect the offspring. Where marriage was recently thought to belong to those who wish to procreate, many engaged in marriage have no intention of every procreating. Still, it is intended to help guarantee offspring medical and physical benefits. Parents are supposed to be accountable for their offspring until that child reaches the age of 18 years. The wives are also provided for in word at least, unless the popular prenuptial agreements were in place prior to becoming married.
6) Marriage is a legal and binding contract with only one legally allowable escape clause--Death!
7) People who are in love but not married are denied rights they would have from a marriage in the case of pension plans and veterans medical benefits, even the Px use.
Problems surrrounding marriage today.
1) Doesn't control adultry or the birth of children that are produced from it.
2) No guarantee of a better life for the child brought into this world. Check out Foster Care facts.
3) In 2001, for every 1000 people, 7.8 marriages were performed (15.6 people) while 4 divorces were performed (8 people). That looks like half of all new marriages end up in divorce--something like that. Overall, one in four marriages end up in divorce. Divorce, the breaking of a contract has become our number 2 Gross Domestic Product and depends largely on the redistribution of wealth, a great loss financially for the married couple going their separate ways.
4) Many families who do not subscribe to marriage are denied pensions as I previously stated, not just gay partners, but all unmarried partners. Even in states where there are Domestic Partnering laws and Common Laws or Civil Unions, there is a chance couples will be denied some of the rights married people have, such as visitation rights in the hospital ward's trauma units.
Conclusion
Yes, marriage changes through time and no matter how we legislate it, the original purpose to protect the offspring is nullified. Spousal rights have been dilluted.
All the current debates on the matter including Gay marriages take our minds off the issues our government doesn't wish us to push--domestic partnership reformation.
Marriage isn't a right; it's fluff. So fight-fight-fight and you too can obtain a contract easily broken, but if that is what it takes to get a piece of your pie, then bon appetite.