Manifesto: three classic essays on how to change the world are written by three relatively young people: Karl Marx when he was 30, Rosa Luxemburg, 27, and Che Guevara, 37. They were born in different ages and generations, yet they share a common hope, a common engagement with history, a belief that critical thinking should engender action and passion for the world and all of human potential. In their lives and struggles, all three insist that a materially formed society must undergo radical changes to ensure that this potential is realized, regardless of whether this potential is blocked or denied in the existing conditions. As educated and strong-minded people, they have always sharpened their minds about the struggle. If you have curiosity and open your heart to the life around you, if you are disturbed by the question of why, how and by who holds and exercises political power, if you feel that there must be an intellectual reason for the unhappiness that haunts you, if your curiosity and openness cause you to desire to act together with others to “do something,” then you have much in common with the authors of the three essays featured in this book.