Whenever you’re talking about influential people, it’s hard not to mention Martin Luther King Jr. The civil rights leader was one of the most prominent figures in the 20th century, a minister who fought for racial equality and is best known for his “I Have a Dream” speech at the 1963 March on Washington. He was assassinated in 1968, but his legacy lives on through his speeches and actions which helped shape the world’s views about the fight for equality.

Albert Einstein, one of history’s most outstanding scientists, developed his theory of relativity at age 37. Nobody revolutionized physics like he did. He won a Nobel Prize in physics in 1921 for his services to theoretical physics and especially for his discovery of the law of the photoelectric effect.

Abraham Lincoln, the 16th president of the United States, was a man who lived for what he believed in. He was the leader the country needed during one of the darkest times in American history, led the Union to victory over the Confederacy, and abolished slavery with his Emancipation Proclamation, which made him one of America’s most beloved presidents.

Nikola Tesla was an inventor, engineer, physicist, and futurist who contributed significantly to electrical science and technology while working with Thomas Edison — although their turbulent work relationship caused by clashing ideologies is well-known, and the two scientists later parted ways for good. Tesla’s most significant contribution to the world was his invention of alternating current, a revolutionary technology that made transmitting electricity over long distances much cheaper.

Not all heroes wear capes. Sometimes they wear smiles — and Nelson Mandela’s became a trademark of the charismatic leader. For a man who spent 27 years in prison for opposing the cruel apartheid system in South Africa, he still had the strength to guide his country towards liberation and became an inspiration to millions of people. There’s no way we wouldn’t mention him among the most important people in history.

Orville and Wilbur Wright were aviation pioneers who invented, built, and flew the world’s first motor-operated airplane in 1903 at Kitty Hawk, North Carolina. Their invention paved the way for modern commercial aviation as we know it today. The fact that the two brothers were self-taught mechanical engineers made their impact on the world even more incredible.

The only American Founding Father to sign all the key documents that officially established the United States of America as a nation, he was among the primary authors of the Declaration of Independence. Tirelessly innovative, capable, and wise, he was also instrumental in creating the U.S. postal system, the lighting rod, and bifocals, among other inventions.

Little is known about his life except what classical authors — particularly his students Plato and Xenophon — wrote about him. Still, we like to think his most notable skill was making people feel like they were the dumbest person in the room. He’s widely regarded as one of the wisest men of all time and is credited as the founder of Western philosophy. Despite this, his views and personality got him a lot of hate in Athens, to the point he was sentenced to death.

The “Father of India” and one of the most well-known pacifists to date, Gandhi successfully used nonviolent resistance as a form of protest against British colonial rule in India — a movement that became known as Satyagraha (“truth force” in Sanskrit). Gandhi’s influence on civil rights movements worldwide is still profoundly felt today.

As the United States’ first president and the Founding Father who led the Patriot forces to victory during the American Revolutionary War, George Washington is often included among famous historical people worth mentioning. He also served as the president of the convention that wrote the Constitution of the United States in 1787.