No stopping history and change

To say that the future will be different from the present is, to scientists, hopelessly self-evident. I observe regretfully that in politics, however, it can be heresy. It can be denounced as radicalism, or branded as subversion. There are people in every time and every land who want to stop history in its tracks. They fear the future, mistrust the present, and invoke the security of a comfortable past which, in fact, never existed. It hardly seems necessary to point out in California -- of all States -- that change, although it involves risks, is the law of life.

Robert F. Kennedy, 1964 Address at the California Institute of Technology