World War Two greatly shaped the world we live in today. What is the
legacy of WW2? In other words, what is the most significant impact,
consequence, or lesson learned from the events of this period? *

The Great Depression impacted the U.S and now Japan knows not to mess with the U.S because we'll drop a bigger bomb. /:

Explanation:

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.