Because sexual orientation is complex and multi-dimensional, some academics and researchers, especially in queer studies, have argued that it is a historical and social construction. In 1976, philosopher and historian Michel Foucault argued in The History of Sexuality that homosexuality as an identity did not exist in the eighteenth century; that people instead spoke of "sodomy," which referred to sexual acts. Sodomy was a crime that was often ignored, but sometimes punished severely (see sodomy law). He wrote, "'Sexuality' is an invention of the modern state, the industrial revolution, and capitalism."
Why do researches in homosexual studies argued that it is a social and historical constuction?
Because sexual orientation is complex and multi-dimensional

The British Prime Minister, the Duke of Newcastle, was optimistic that the new series of alliances could prevent war from breaking out in Europe. However, a large French force was assembled at Toulon, and the French opened the campaign against the British by an attack on Minorca in the Mediterranean. A British attempt at relief was foiled at the Battle of Minorca, and the island was captured on 28 June (for which Admiral Byng was court-martialed and executed). War between Britain and France had been formally declared on 18 May nearly two years after fighting had broken out in the Ohio Country.
When was war declared between Britain and France?
War between Britain and France had been formally declared on 18 May

The social identity of the children was strongly determined by the tribe's kinship system. Among the matrilineal tribes of the Southeast, the mixed-race children generally were accepted as and identified as Indian, as they gained their social status from their mother's clans and tribes, and often grew up with their mothers and their male relatives. By contrast, among the patrilineal Omaha, for example, the child of a white man and Omaha woman was considered "white"; such mixed-race children and their mothers would be protected, but the children could formally belong to the tribe as members only if adopted by a man.
What race did the Omaha view a multiracial child with a white father to be?
white