Technology.
World War 1 was the first war in an industrialized age. New weapons and vehicles were used in this war that had never been used before. With the invention of the plane in 1901 led the way for the plane to be used as a gun ship, light bomber, and heavy bomber.
Convincing the American colonists it was time to break away from England's rule and abusive monarchy.
It was Henry Hudson's and James Cook's explorations that led to a greater knowledge of North America, the Arctic, Australia, and the Hawaiian islands, since this was their primarily goal in setting out into highly uncharted and dangerous territory.
Chemical energy (from food) into kinetic energy (movement).
Hope this helps!
