Australia Is The Most Isolated Continent.

African Cavalry Mounted On Rhinos Or Hippos Would Have Made Mincemeat Of European Cavalry Mounted On Horses. But It Couldnt Happen.

But This Was The Only Way Of Life That Humans Knew For Their First 6m Years On The Planet. In Giving It Up Over The Past Few Thousand Years, We Have Lost Our Vulnerability To Disease And Cold And Wild Animals, But We Have Also Lost Good Ways To Bring Up Children, Look After Old People, Stave Off Diabetes And Heart Disease And Understand The Real Dangers Of Everyday Life.

It's Striking That Native Americans Evolved No Devastating Epidemic Diseases To Give To Europeans, In Return For The Many Devastating Epidemic Diseases That Indians Received From The Old World.

Technology Causes Problems As Well As Solves Problems. Nobody Has Figured Out A Way To Ensure That, As Of Tomorrow, Technology Won't Create Problems. Technology Simply Means Increased Power, Which Is Why We Have The Global Problems We Face Today.

Human Societies Vary In Lots Of Independent Factors Affecting Their Openness To Innovation.