The term stratification refers to the way different groups of people are placed at different levels in society. The levels are strata- a term borrowed from geology, the study of rocks. In geology. There are different strata of rocks formed at different times in history. In our case, the strata are classes, and classes will be the main type of stratification we consider here.
Gender, ethnicity and age, which are considered elsewhere in the book, are also aspects of stratification.
Gender, ethnicity and age, which are considered elsewhere in the book, are also aspects of stratification.