For Extending Its Sway, Partly By Force

For Extending Its Sway, Partly By Force Of Arms, Partly By The Voluntary Submission Of Weaker Tribes, The Community Soon Acquires Wealth And Slaves, Both Of Which, By Relieving Some Classes From The Perpetual Struggle For A Bare Subsistence, Afford Them An Opportunity Of Devoting Themselves To That Disinterested Pursuit Of Knowledge Which Is The Noblest And Most Powerful Instrument To Ameliorate The Lot Of Man.