1723-1790 1878-1950 1883-1955 1899-1992 18thcentury 1902-1994 1905-1983 1907-1967 1909-1997 192 192b 19thcentury 20thcentury 860 adam aron berlin biography bowman christianity christianityandotherreligions coldwar contributionsinphilosophyberlin contributionsinpoliticalscienceberlin correspondence deutscher europe geographers geography globalization greatbritain hayek history individualism isaac jean-françois josé josé liberalism liberty materialesenespañol modern ortegaygasset phi016000phi019000 philosophers philosophy pluralism political politicalscience politicalscientists popper raymond religiouspluralism religioustolerance revel sir smith surveys unitedstates