The late Timothy Leary, at the time a Harvard University research professor, first used which substance in 1961 and immediately began a movement to have every child and adult try the drug and "turn on, tune in, and drop out.

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The Answer of The late Timothy Leary, at the time a Harvard University research professor, first used which substance in 1961 and immediately began a movement to have every child and adult try the drug and "turn on, tune in, and drop out.

The Late Timothy Leary, at the Time a Harvard University