Isaac Asimov Escaping Quotations

The tyranny that now exists is actual. That which may exist in the future is potential. If we are always to draw back from change with the thought that the change may be for the worse, then there is no hope at all of ever escaping injustice.

There are so many benefits to be derived from space exploration and exploitation; why not take what seems to me the only chance of escaping what is otherwise the sure destruction of all that humanity has struggled to achieve for 50,000 years?