Progressivism continued to push for environmentalism, women's rights, civil liberties, and unions. The civil rights revolution pushed Americans to use their voices and fight for their rights. The movements of the 1960s emphasized personal liberation. Progressivism transformed into a movement that challenged people to stand up for what they want. Furthermore, people began to fight to protect the environment. Under Republican Richard Nixon, a series of measures were passed to protect the environment. The Clean Air and Clean Water Acts and the Endangered Species Act were passed in the late 1960s and early 1970s (page