<p>I just started a biography of Thurgood Marshall by Juan Williams. You could make a pretty strong case for him. If you want to go Pop Culture I think you could do a great deal with Bob Dylan. </p>
<p>How about Alexander Hamilton? Chernow’s biography is excellent.</p>
<p>You can make a good case for almost all of these nominees. But let me add 3-4 names: </p>
<p>Martin Luther King Jr., on the theory that the biggest movement of the 20th century was the sea change in our society of which he was the focal point.</p>
<p>Harriet Beecher Stowe, “the little lady who caused the big war”. Probably not the most influential American, but a choice, given the fact that post 1850, the Civil War was probably the seminal event.</p>
<p>Lastly, either Alexander Graham Bell or the man who invented the transister. The 20th century will probably be known as either the computer age or the electronic age.</p>
<p>I say do a top nuclear scientist, like J. Robert Oppenheimer or Edward Teller. I did a biography project on Oppenheimer for English and read a biography by Goodchild. However, I think the biography entitled American Prometheus is also good.</p>
<p>I think it was A. Lincoln. Initially he was lukewarm about slavery. After he came to Washington and had experience there he knew the importance of the matter. Mind you, England abolished slavery in 1756.</p>