"Any sufficiently advanced technology is indistinguishable from magic."
-Arthur C. Clarke, 1917-2008.
Not too much to say, here, other than that Sir Arthur C. Clarke is responsible for much of the direction of science fiction (and a surprising amount of the nonfictional science) that shaped the 20th century.
The idea of using geostationary satellites (in what have come to be called Clarke orbits) for telecommunications relays? Clarke's.
2001: A Space Odyssey? Clarke's.
Space elevators? Well, not completely Clarke's, but he was one of the primary proponents of the idea. ("It will be built about 10 years after everybody stops laughing." People are working on the materials science now.)
YouTube video of his last public statement to his fans.
Sir Arthur C. Clarke, requiescat in pace.