Who is Abraham Lincoln from The Creature from Jekyll Island: A Second Look at the Federal Reserve and what is their importance?

Abraham Lincoln was President of the US from 1861 to 1865. His presidency spanned the Civil War and he was assassinated by John Wilkes Booth. The author explained how Lincoln had done several unconstitutional actions during the War, justified as necessary for saving the Union. However, the additional presidential power survived and became entrenched. Regarding the economy, Lincoln established greenbacks as the national currency.