The concept of a moment of impact can relate to how the past alters the future. One choice of an individual, or a group of people, can alter the future for decades to come. And these actions over a century in time, influence social change. The twentieth century is a great example of constant change. One day, one event, one moment of impact altered this century to feel happiness and achievement, and to feel sadness and weakness. These ten photographs showcase ten decades of moments that defined the future, as people fought, people died and people rebuilt. Technology boomed and exploded, while discoveries occurred and inventions were made. War raged throughout the whole century from one place to another and yet peace always found a way back in. And while millions of people died, millions were born. This century saw an explosion of power, intelligence, and success, which shaped the twenty-first century that was to follow.