Which country gained the most from imperialism in which country suffered or lost the most

The British, by far. Their empire spanned the U.S Colonies, Canada, India, Middle East, Australia, Caribbean islands, and Africa. The mercantile economic system, naval strength, and early industrialization allowed them to dominate despite setbacks such as the American Revolution.

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.