Critics of gay marriage see it as an affront to sacred, time-tested traditions. In actuality, the institution has been in a process of constant evolution.
The ancient Hebrews, for instance, engaged in polygamy — according to the Bible, King Solomon had 700 wives and 300 concubines — and men have taken multiple wives in cultures throughout the world, including China, Africa, and among American Mormons in the 19th century. Polygamy is still common across much of the Muslim world.
The idea of marriage as a sexually exclusive, romantic union between one man and one woman is a relatively recent development. Until two centuries ago, said Harvard historian Nancy Cott, “monogamous households were a tiny, tiny portion” of the world population, found in “just Western Europe and little settlements in North America.”