in anarchism (as he had first believed) or whether it pointed to a continued role for the state, albeit one reduced to the minimal functions of the enforcement of contracts and external defense. Though Spencer made some valuable contributions to early sociology, not least in his influence on structural functionalism, his attempt to introduce Lamarckian or Darwinian ideas into the realm of sociology was unsuccessful. It was considered by many, furthermore, to be actively dangerous. Hermeneuticians of the period, such as Wilhelm Dilthey, would pioneer the distinction between the natural sciences (Naturwissenschaften) and human sciences (Geisteswissenschaften). In the United States, the sociologist Lester Frank Ward, who would be elected as the first president of the American Sociological Association, launched a relentless attack on Spencer's theories of laissez-faire and political ethics. Although Ward admired much of Spencer's work he believed that Spencer's prior political biases had distorted his thought and had led him astray. In the 1890s, Émile Durkheim established formal academic sociology with a firm emphasis on practical social research. By the turn of the 20th century the first generation of German sociologists, most notably Max Weber, had presented methodological antipositivism. However, Spencer's theories of laissez-faire, survival-of-the-fittest and minimal human interference in the processes of natural law had an enduring and even increasing appeal in the social science fields of economics and political science, and one writer has recently made the case for Spencer's importance for a sociology that must learn to take energy in society seriously. Ethics The end point of the evolutionary process would be the creation of 'the perfect man in the perfect society' with human beings becoming completely adapted to social life, as predicted in Spencer's first book. The chief difference between Spencer's earlier and later conceptions of this process was the evolutionary timescale involved. The psychological – and hence also the moral – constitution which had been bequeathed to the present generation by our ancestors, and which we in turn would hand on to future generations, was in the process of gradual adaptation to the requirements of living in society. For example, aggression was a survival instinct which had been necessary in the primitive conditions of life, but was maladaptive in advanced societies. Because human instincts had a specific location in strands of brain tissue, they were subject to the Lamarckian mechanism of use-inheritance so that gradual modifications could be transmitted to future generations. Over