"While countries like Zimbabwe, Malawi and El Salvador have recently banned child marriage, it remains legal in the US - and half of states have no set minimum age below which you cannot get married." (the BB website) Why? Because many Americans, and Westerners, are busy "liberating" Muslim women!
“The West won the world not by the superiority of its ideas or values or religion (to which few members of other civilizations were converted) but rather by its superiority in applying organized violence. Westerners often forget this fact; non-Westerners never do.” —Samuel P. Huntington, The Clash of Civilisation and the Remaking of the World Order, 1996, p. 51