Did you know marrying for love is a pretty recent development in human history? A couple in love at a wedding may seem like the most natural thing in the world, but for most of human history this was not the principal motivation for the union of two people. Marriage has traditionally been about alliances, gaining in-laws, and expanding the family labor force. So how did love conquer marriage?

Originally released by Knowledgemotion, 2018. Streaming video file encoded with permission for digital streaming by Infobase on February 21, 2020.