The High Frontier Human Colonies In Space Oneill Gerard by O'neill, Gerard 9781144451972, 1144451973 instant download after payment.

In High Frontier, O'Neill had mapped out a straightforward, manifestly doable path to putting humans into space permanently and sustainably, using 1970s materiel and current-day Zubrin-style know-how. But O'Neill died in 1992 seeing humanity no closer to fulfilling his bold vision. 
But O'Neill's idea of pursuing an inexhaustible energy supply (solar power in space) and endless room to expand remains tantalizingly attractive. The science has only gotten easier, and the moral imperative has only become more pronounced, with the planet's resources ever steadily squeezed and the recent knowledge that a mass-extinction event on Earth is nearly inevitable. (O'Neill calls the High Frontier the only chance to make human life—perhaps all life in the universe—"unkillable.") The High Frontier is as exciting a read as it ever was 25 years since O'Neill's original manifesto.
Gerard K. O’Neill, PhD, was a faculty member of the physics department at Princeton University. He founded the Space Studies Institute and invented the storange ring technique for colliding particle beams.