A brief essay on Solar Power Satellites, a key element of O'Neil's High Frontier program

A strong statement on the human space imperative by a group of European organizations.

Essays, quotes, and a radio interview from science fiction author Sylvia Engdahl, about the importance of expanding beyond Earth.

Louis J. Halle, formerly of the U.S. Department of State, writes in Foreign Affairs (Summer 1980) that space colonization will protect humanity in the event of a global nuclear war (subscription/payment required for full article).

Essay by Isaac Asimov about the need for the future settlement of space.

Interview with Britain's Daily Telegraph in which eminent cosmologist Stephen Hawking warns that the human race is likely to be wiped out before the millennium is out unless we set up colonies in space.

Collection of statements on space policy, including essays on colonization and use of space resources.

Detailed discussion by Rex Stephens about his book on the need for space colonization, asteroid mining, and transhumans.

Plans to save civilization by sending people and important documents into space in a 21st Century "Noah's Ark" might get a boost from fears of bioterrorism.

Vision of "people living and working in thriving communities beyond the Earth".