By Victor Davis Hanson, Townhall - History also reminds us that nature remains unforgiving. We may live in the age of the Internet, smartphones and jet travel, but viruses are indifferent to so-called human progress… Modern life squeezes millions into cities as never before. Jet travel, with its crowded planes and airports, can spread diseases from continent to continent in hours… Globalization is a two-edged sword. It may enrich billions of people, but the leveling effects of instant communication and travel can spread disease at a speed undreamed of in the past.