Didn't America's civil rights as well as communism fear/wars, population explosion fear, and nuclear holocaust fear, happen in a time absolutely brimming with t

Didn't America's civil rights as well as communism fear/wars, population explosion fear, and nuclear holocaust fear, happen in a time absolutely brimming with technological marvels like nuclear power, space travel, and the first computers, not to mention general technological utopia thinking? I don't see why you can't have both. Maybe stop worrying about the politics and get more enthusiastic about Mars colonies or machine learning or whatever.