
Martin Luther King’s famous “I Have a Dream” speech is best known for his statements of possibility and the energy with which he concluded his remarks. It is a compelling call to purpose, to a world in which the future is only currently imagined. It provided a generative image of what is possible, if not what is attainable, and it did what a good purpose does: it helped take the place of a charismatic leader. Internalized, that purpose drives the movement.