Science fiction legend Robert Heinlein is a walking contradiction. His stories address themes of patriotism and duty while at the same time stressing the importance of personal freedom and expression.
In Robert Heinlein's 1952 novel The Puppet Masters, the world is taken over by mind-controlling invaders. Is this mere science fiction? Not when an actual cutting-edge magnetic device has been proven to alter the outcome of decisions when trained on the human brain.
With 1960's Starship Troopers, Robert Heinlein writes of a military equipped with strength-enhancing power suits. Today, electronic exoskeletons are being developed for the U.S. Army, to create the super soldiers of tomorrow.