The second episode explores how the Summer of Love of 1967 set in motion an era of social upheaval that pitted America's youth against its elders and how the American government responded with a series of brutal crackdowns. The hippies failed politically, but their cultural influence changed the world. Everything from the environmental movement to the explosion in alternative health practices to the birth of feminism all grew out of this moment. And most surprising of all, we trace how hippie ideas first imagined on LSD went on to shape the information age itself.