Question: who was the most important person in the civil war?
Answer: Abraham Lincoln. Abraham Lincoln (1809–1865) was the 16th President of the United States during one of the most consequential periods in American history, the Civil War. ... 
Jefferson Davis. ... 
Robert E. Lee. ... 
Ulysses S. ... 
Harriet Beecher Stowe. ... 
Robert Gould Shaw.