1 Introduction and Setting 2 The First Epistemological Problems 3 The Relativity of Ideal-Types 4 The First Solution of the Epistemological Problems 5 Metaphysical Interlude 6 The Functional'Solution' of the Scientific and Epistemological Problems 7 Of Thinking and Explaining the Composition of Large-Scale Societies and Their Evolution 8 Conclusion: On Unification of Social Knowledge