The first Earth Day was celebrated on April 22, 1970, at the height of hippie culture, the Vietnam War, and industrialization. Earth Day came about as the result of founder Gaylord Nelson's realization that he could capture the energy of anti-war protests, and channel it into creating awareness about pollution and environmental preservation.
As a result of Nelson's efforts, more than 20 million Americans went out on April 22nd to demonstrate for a healthier environment. These demonstrations brought together multiple sectors in society under one overarching desire for a cleaner, healthier world. Republicans and Democrats, urban dwellers and farmers, rich and poor, all demonstrated together and realized they had more in common than they had thought.
Since 1970, Earth Day has become a world-wide movement to push for environmentally-friendly changes in all countries. Past Earth Days have focused on recycling, climate change, renewable energy, and other related subjects. As a result, we now have the Environmental Protection Agency, the Endangered Species Act, and the Clean Air and Water Act.