Hope dis helps :)
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The </span>Egyptians invented<span> and used many simple machines, such as the ramp and the lever, to aid construction processes. They used rope trusses to stiffen the beam of ships. </span>Egyptian<span> paper, </span>made<span> from papyrus, and pottery </span>were<span> mass-</span>produced<span> and exported throughout the Mediterranean basin.</span>
Imperialism, nationalistic pride and mutual alliances all played a part in building tensions that would erupt into war. World War I, which lasted from 1914 until 1918, introduced the world to the horrors of trench warfare and lethal new technologies such as poison gas and tanks.
The main reason we didn't join the League of nations is because we had the policy of isolationism
isolationism = America wants to focus on ourselves, we want to stay out of trouble
It started september 1, 1939 .
It has made people lazier but also helped because all the information that they could possibly need is at their fingertips.