To me, photography is the simultaneous recognition, in a fraction of a second, of the significance of an event.

—Henri Cartier-Bresson

For the first square print sale of the year, Magnum Photos is recognizing the 50th anniversary of a turbulent, decisive year around the world—1968. That year saw a series of seismic shifts that altered the social and political landscape in the United States and abroad: student protesters marched through cities across the country; the Civil Rights movement took hold; Martin Luther King was assassinated; the Prague Spring rocked Czechoslovakia; anti-Vietnam activists mobilized outside the White House at all hours; and young people rioted across France.

All of these movements were galvanized by the desire for freedom: freedom from oppression, freedom of speech, and freedom for political, sexual, and religious beliefs. Fifty years later, Magnum has asked a group of its photographers to consider the term “freedom” and respond with images that are representative of this broad but critical term.

The resulting set of photographs offers an absorbing survey of the myriad conceptions of what it means to be “free,” whether that term conjures an image of a home free from the pressures of society or a resistance against political oppression. This group of prints includes such monumental work as Stuart Franklin’s photograph of Tiananmen square in 1989, images by Bruce Davidson and Leonard Freed of the Civil Rights movement, and Susan Meiselas’ image of a young revolutionary in Nicaragua.

The sale runs from June 4 through June 8 at 6pm EST. Each museum-quality print can be yours for $100—but they will be available for only five days from the Magnum Photos online store.

Below, our editors have chosen 43 of their favorite images from the sale—we hope you enjoy this selection. Visit Magnum’s page to see the full offering.