() is explanation (), while that of history is understanding (). The concept of Verstehen was later used by the German philosopher Wilhelm Dilthey to describe the first-person participatory perspective that agents have on their individual experience as well as their culture, history, and society. In this sense, it is developed in the context of the theory and practice of interpretation (as understood in the context of hermeneutics) and contrasted with the external objectivating third-person perspective of explanation () in which human agency, subjectivity, and its products are analyzed as effects of impersonal natural forces in the natural sciences and social structures in sociology. Twentieth-century philosophers such as Martin Heidegger and Hans-Georg Gadamer have been critical of what they considered to be the romantic and subjective character of Verstehen in Dilthey, although both Dilthey and the early Heidegger were interested in the "facticity" and "life-context" of understanding, and sought to universalize it as the way humans exist through language on the basis of ontology. Verstehen also played a role in Edmund Husserl and Alfred Schutz's analysis of the "lifeworld." Jürgen Habermas and Karl-Otto Apel further transformed the concept of Verstehen, reformulating it on the basis of a transcendental-pragmatic philosophy of language and the theory of communicative action. Weber and the social sciences Max Weber and Georg Simmel introduced interpretive understanding () into sociology, where it has come to mean a systematic interpretive process in which an outside observer of a culture (such as an anthropologist or sociologist) relates to an indigenous people or sub-cultural group on their own terms and from their own point of view, rather than interpreting them in terms of the observer's own culture. Verstehen can mean either a kind of empathic or participatory understanding of social phenomena. In anthropological terms this is sometimes described as cultural relativism, especially by those that have a tendency to argue toward universal ideals. In sociology it is an aspect of the comparative-historical approach, where the context of a society like twelfth century "France" can be potentially better understood () by the sociologist than it could have been by people living in a village in Burgundy. It relates to how people in life give meaning to the social world around them and how the social scientist accesses and evaluates this "first-person perspective." This concept has been both expanded and criticized by later social scientists. Proponents laud this concept as the only