The camera is a tool — but to do what? Images shape our daily life, yet we rarely question how they’re made or why.

One of the most iconic photos in American history was taken 51 years ago on May 4, 1970.

1 Astronaut, Many Cameras and 220 Days of Amazing Images From Space

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When Muhammad Ali knocked down Sonny Liston on May 25, 1965, a 22-year-old photographer named Neil Leifer was ringside. Decades later, the image he captured still has our attention.

We love iconic photographs that are bigger than life. The following were chosen by the editors of History Fact as the most iconic photographs of every decade until now. Agree? Disagree? 

A demonstrator stands among smoke during the Israeli-Gaza protests in 2018 (Photo: Samar Abu Elouf)

It started with my publishing "Are These the 5 most Famous Photographs in History?" and soon had some other suggestions. So I thought it would be fun to see what others consider time stopping photographs. Take a look, let me know if you agree, don't agree and what others should we include. Notice: I don't claim to own any copyright to any of the images. This is my personal celebration of great photography.

In March 1936, photographer Dorothea Lange captured what many consider to be the most recognizable photo from the Great Depression. The image, titled “Migrant Mother, Nipomo, California,” features a 32-year-old farmworker and mother of seven who was later identified as Florence Owens Thompson.

Photographs by Kristof Ramon