It was Banned in the United States by the Merrill Act in 1862
Uh, no. there is no such thing as the Merrill act. it is called the Morrill act of 1862 and has nothing to do with polygamy. The United States federal government does not ban polygamy. However every state does ban it in one form or another.
In many areas of the world polygamy is still permitted. In the United States of America polygamy was outlawed by the Morril Anti-Bigamy Act in 1862. This law does not apply to serial marriage, or simultaneous co-habitation.
It would be easier to ask 'when did polygamy become illegal?' The answer is after the ascension of the Roman Empire.
Polygamy is not in any amendment, it was outlawed by a Supreme Court decision.
The United States government outlawed polygamy in all it's states and territories in 1865. As Utah was a territory at that time, polygamy was outlawed in Utah Territory by an act of the United States government.
Utah
Polygamy - 1936 was released on: USA: 15 November 1936
Polygamy USA - 2013 The Baptism 1-3 was released on: USA: May 2013
it isn't outlawed there are slaves in Italy
Polygamy USA - 2013 The New Polygamists 1-6 was released on: USA: June 2013
In some cultures, polygamy is the normal practice. Mormons used to practice polygamy. I don't think polygamy would be right for me. Tomas defended polygamy, as having multiple wives suited him. Polygamy is not an accepted practice in mainstream LDS. Polygamy is outlawed in most of the 50 states.
Outlawed - 1913 was released on: USA: November 1913
1925
Outlawed - 1921 was released on: USA: 21 May 1921
Breaking Polygamy - 2012 TV was released on: USA: 21 November 2012