Human progress has always been driven by a sense of adventure and unconventional thinking.

Human progress has never been shaped by commentators, complainers or cynics.

There has to be a global mission of human progress.

America's greatest strength has always been its hopeful vision of human progress.

Perhaps the spirit of adventure, be it mental or material adventure, is a factor so essential in human progress that no emphasis of it is undue.

The liberty of the individual is a necessary postulate of human progress.