The first global U.S. athlete of the television age, Ali set the mold for generations that followed. His activism and bravery continue to inspire athletes to speak out on social issues. His influence is felt in hip-hop, politics, and the American lexicon. In reaction to his death, then-President Barack Obama said, “Muhammad Ali shook up the world. And the world is better for it. We are all better for it.”

Ali’s life was defined not only by his victories but by his conviction, generosity and enduring belief in the power of love and humanity. His spirit continues to inspire people everywhere, and his legacy lives on as “The Greatest.”

The Muhammad Ali stamps are issued in panes of 20. As Forever stamps, they will always be equal in value to the current First-Class Mail 1-ounce price.