From its pulpy origins, science fiction has blossomed into an incredible genre that seeks to investigate humanity's biggest questions with a smile. It asks old questions -- what are our biggest fears? What are our most cherished hopes? -- in new ways to see if the answers are any different. And it's the best genre of literature. Debate me, lit-bros!
In the best examples of the form, you'll find alien species that teach us about being human, nanotechnology that pushes us to our physical limits, wars that span eons and galaxies, revolutions, martyrs, and plenty of sentient AIs. Let the list below, organized from the earliest published work to the most recent, steer you toward your next reality-shattering read.