This document provides an overview of key topics in sociology for the 21st century sociologist. It discusses the changing nature of the world and sociology from the 18th century to the present day. Globalization, consumption, the digital world, and their interconnections are central concerns. The sociological imagination allows sociologists to understand how individual experiences relate to broader social patterns and structures. Sociology aims to scientifically study relationships between social structures and processes, though some argue it should also be used to solve social problems.