consequences." The use of "tends to" implies some degree of freedom to happen or not happen, but in strict determinism, given certain causes, the result and only that result must occur. Different philosophers, however, use determinism in different senses. The deterministic element that Harris sees is lack of human social engineering: "free will and moral choice have had virtually no significant effect upon the direction taken thus far by evolving systems of social life." Harris agrees with the 19th-century view that laws are abstractions from empirical evidence: "...sociocultural entities are constructed from the direct or indirect observation of the behavior and thought of specific individuals ...." Institutions are not a physical reality; only people are. When they act in society, they do so according to the laws of history, of which they are not aware; hence, there is no historical element of free will. Like the 20th-century anthropologists in general, Harris places a high value on the empiricism, or collection of data. This function must be performed by trained observers. He borrows terms from linguistics: just as a phon-etic system is a description of sounds developed without regard to the meaning and structure of the language, while a phon-emic system describes the meaningful sounds actually used within the language, so anthropological data can be emic and etic. Only trained observers can avoid eticism, or description without regard to the meaning in the culture: "... etics are in part observers' emics incorrectly applied to a foreign system...." He makes a further distinction between synchronic and diachronic. Synchronic ("same time") with reference to anthropological data is contemporaneous and cross-cultural. Diachronic ("through time") data shows the development of lines through time. Cultural materialism, being a "processually holistic and globally comparative scientific research strategy" must depend for accuracy on all four types of data. Cultural materialism differs from the others by the insertion of culture as the effect. Different material factors produce different cultures. Harris, like many other anthropologists, in looking for anthropological method and data before the use of the term anthropology, had little difficulty finding them among the ancient authors. The ancients tended to see players on the stage of history as ethnic groups characterized by the same or similar languages and customs: the Persians, the Germans, the Scythians, etc. Thus the term history meant to a large degree the "story" of the fortunes of these players through time. The ancient authors