In the early 1960's, E.R. Leach and Claude Levi-Straus laid the groundwork by viewing social structures as models derived from social ideals. The preeminent writer to emerge in the field was Clifford Geertz who showed that the common Balinese cock fight was an institution directly derived from Balinese conceptions of the State and divinity. In Morocco, he and his wife showed that everyday market negotiations for meat and credit were institutions based on high-level ideas of family behavior and conceptions of religious order.