David Harvey is a prominent geographer and social theorist known for his work on urbanization and the dynamics of capitalism. His theories emphasize the relationship between space and social justice, arguing that geographical factors significantly influence economic and social inequalities. He explores how urban environments are shaped by capitalist processes, leading to issues like gentrification and displacement. One of Harvey's key concepts is the idea of spatial fix, which refers to how capitalism seeks to resolve its crises by reorganizing space. He also discusses the importance of time-space compression, highlighting how technological advancements alter our perceptions of distance and time, impacting social relations and economic practices in contemporary society.