If you go by 'number of people' then monogamy (one man one woman) is the most common.
If you go by the number of cultures then polygyny (one man many women) is the most common even though the vast number of people in these cultures are monogamous.
In the aftermath of major wars unofficial polygyny become quite common even though it is not admitted to.
There are several misconceptions about common law marriage. The most common of those misconceptions is that living together for seven years means a couple has a common law marriage.
Most definately, however same sex marriage is slowly starting to become acceptable - with many opposers of course. I envisage a future where same sex marriage will be as common as other type of marriage.
The most common blood type is O.
The most common blood type is the o+ blood type.
Most men who propose marriage are in love with the woman and wants to marry her and have a family with her.
marriage
polygyny
The most common blood type is A positive and the most rare is type O.
Common law marriage has been abolished in most states. In the states that still have it, there are certain requirements.
Arkansas (along with most states) does not recognize common law marriage. The only exception to that would be if you previously lived in another state that did recognize common law marriage (again, most states don't) and you were considered common law married in that state, and you then later moved to Arkansas.
what is the most common type of external bleeding
"Common law marriage" does not exist in most jurisdictions. The obvious difference is the absence of legal protections, obligations and benefits that come automatically with a legal marriage under state and federal laws.