3.The four stages of social theory 3. 1 The first stage: from 1837 to the beginning of 20 century---the foundation of sociology 3.2 The second stage: from 1920s to 1960s---the general theory appearance 2021/2212021/2/21 3 ▪ 3.The four stages of social theory ▪ 3.1 The first stage: from 1837 to the beginning of 20 century---the foundation of sociology ▪ 3.2 The second stage: from 1920’s to 1960’s---the general theory appearance ▪