And returns higher than 5 to 1 were often thought of as essential for the maintenance and progression of present high standards of living in advanced societies. (robertscribbler.com)
Scientists and the most advanced societies are quite literally turning their backs to this knowledge and these forms of fire management. (dotearth.blogs.nytimes.com)
When a society is unified, those with greater resources are willing to assume greater burdens to advance society as a whole. (firstthings.com)