From the 1960s to 1990s, theory of social situation developed on the basis of deep discussions of the characteristic of underclass and its emergence.

• 摘要1960-1990年代，西方学术界围绕“底层阶级”贫困群体的特征及产生，进行了一系列深入的研究和讨论，并形成了与此相关的理论解释-社会情境理论。