Here is a summary of major environmental events that can be used to support 1.1 Environmental History and Attitudes, 1.1 Important People in Environmentalism and 1.1 Sometimes it takes a Disaster 1796 Invention of Vaccines - Smallpox - by Edward Jenner1798 publication of An Essay on the Principles of Population by Thomas Malthus 1859 publication of On the Origin of Species by Charles Darwin1890 Formation of Yosemite...