According to Harris, the 19th-century anthropologists were theorizing under the presumption that the development of society followed some sort of laws. He decries the loss of that view in the 20th century by the denial that any laws are discernable or that current institutions have any bearing on ancient. He coins the term ideographic for them. The 19th-century views, on the other hand, are nomothetic; that is, they provide laws. He intends "to reassert the methodological priority of the search for the laws of history in the science of man". He is looking for "a general theory of history". His perception of the laws: "I believe that the analogue of the Darwinian strategy in the realm of sociocultural phenomena is the principle of techno-environmental and techno-economic determinism", he calls cultural materialism, which he also details in "Cultural Materialism: The Struggle for a Science of Culture."