His most famous work, 'Fahrenheit 451,' for example, tackled the zombification of people with the rise of the tv and what he perceived as the decline of the book. In its world, books were outlawed and burned whenever seen, while people stared lifelessly into televisions to get their news, entertainment and education.
His success was at least partially due to him reimagining science fiction. Prior to his works, most science fiction was exceedingly technical. That meant that, while the ideas covered would be of interest to many people, science fiction was relegated to a small niche. Bradbury stripped the jargon out of his prose but left in the big ideas. The result were the first mass-consumption science fiction tales, and it showed by how quickly they sold.
Bradbury's writing career stretched over 70 years. His works never managed to earn him a Pulitzer, but he has received a Pulitzer citation:
“for his distinguished, prolific and deeply influential career as an unmatched author of science fiction and fantasy.”The New York Times has prepped a wonderful obituary about the man, covering his life and featuring quotes. You can read it here.