More important than the material issue . . . the opening of a new, high frontier will challenge the best that is in us . . . the new lands waiting to be built in space will give us new freedom to search for better governments, social systems, and ways of life.

More important than the material issue . . . the opening of a new, high frontier will challenge the best that is in us . . . the new lands waiting to be built in space will give us new freedom to search for better governments, social systems, and ways of life.

Is a planetary surface the right place for an expanding technological civilization?

It is the hope of those who work toward the breakout from planet Earth that the establishment of permanent, self-sustaining colonies of humans off-Earth will ... make human life forever unkillable, removing it from the endangered species list, where it now stands on a fragile Earth overarmed with nuclear weapons. Second, the opening of virtually unlimited new land areas in space will reduce territorial pressures and therefore diminish warfare on Earth itself.

Here is my advice as we begin the century that will lead to 2081. First, guard the freedom of ideas at all costs. Be alert that dictators have always played on the natural human tendency to blame others and to oversimplify. And don't regard yourself as a guardian of freedom unless you respect and preserve the rights of people you disagree with to free, public, unhampered expression.

Don't regard yourself as a guardian of freedom unless you respect and preserve the rights of people you disagree with.

Dictators have always played on the natural human tendency to blame others and to oversimplify.