This document provides an overview of key concepts from Chapter 8 of the sociology textbook, including social stratification, class, and inequality. It discusses theories of stratification from Marx, Weber, and Wright. It also summarizes research on social stratification in the US today, looking at the different classes, mobility, poverty trends, and debates around increasing inequality. Learning objectives cover basic concepts, influential theories, current research, and unanswered questions about stratification, class, and poverty.