William Clark (1770–1838) was the frontiersman and explorer who, with Meriwether Lewis, led the Lewis and Clark Expedition in the Louisiana Territory and Pacific Northwest in 1804–1806. Born in Virginia, Clark joined the militia on the Ohio frontier in 1789 and was commissioned as a lieutenant of infantry in the Army in 1792. Under General Anthony Wayne, Clark took part in the Battle of Fallen Timbers in 1794. He left the military in 1796 and in 1803 was invited by Meriwether Lewis to join him in leading an expedition through the Louisiana...

Sylvester Graham was a clergyman and reformer who advocated a health regimen centered on self-restraint, sanitation, exercise, and diet restrictions. Graham believed that a strict physiological regimen and a plain vegetarian diet of cereals, fruits and vegetables, and bread made from coarsely ground grain—which evolved into the Graham cracker—would eliminate disease and promote physical and spritiual well-being.

Horace Greeley (1811–1872) was the influential editor of the New York Daily Tribune. Greeley founded the Tribune in 1841 and edited the paper for more than thirty years. Greeley used the paper as a platform for reform causes. He opposed slavery, tobacco and alcohol use, gambling, and prostitution. Greeley also supported westward expansion. In 1854, after the disintegration of the Whig Party, Greeley became involved in the newly formed Republican Party and used the Tribune to promote its anti-slavery platform....