Answer:
Sociologists would probably agree to a large degree with that statement.
Step-by-step explanation:
The reason is that social class is one of the most important categories of analysis in the academic discipline of sociology. This is because the three authors that are considered to be founders of the discipline: Karl Marx, Émile Durkheim, and Max Webber, all developed social analysis in which social class was transversal and explanatory of many social phenomenons.
Ever since, other sociologists have taken ideas from these three authors, developed them in new forms, and adapted them to more recent historical periods. However, the theme of social class continues to be present in all of them, as one of the most important, if not the most important, variable explaning the social structure of countries, nations, and peoples.