Claude Lévi-Strauss (1908-2009) was a anthropologist and ethnologist and one of the founding figures of structuralist thought. He looked at the society – looking at how we interact. Also looking within societies – how humans build structures and organisations and relationships are in different cultures. He studied the characteristics of various people and the differences and relationships among them.
For example, marriage is the same act, but is done differently by others (i.e. in different cultures). For example, the ritual followed with a Jewish wedding in comparison to a Hindu wedding etc.