Some people leave a mark on history. Others help shape the future of an entire nation. In this video, we’re looking at 20 of the most significant Americans of all time. These are the leaders, inventors, writers, activists, entrepreneurs, athletes, and visionaries whose impact reached far beyond their own lifetimes. We’ll cover figures like George Washington, Abraham Lincoln, Barack Obama, Henry Ford, Neil Armstrong, Mark Twain, Walt Disney, Muhammad Ali, Steve Jobs, Alexander Hamilton, Martin Luther King Jr., Franklin D. Roosevelt, the Wright Brothers, Susan B. Anthony, Noam Chomsky, Thomas Edison, Benjamin Franklin, Thomas Jefferson, Woodrow Wilson, and Jane Addams. From founding the country and preserving the Union to advancing civil rights, transforming transportation, changing technology, expanding voting rights, shaping literature, inspiring social reform, and even reaching the moon, these Americans helped define history in powerful ways.