"He popularized catchphrases that promoted his philosophy, such as 'turn on, tune in, drop out', 'set and setting', and 'think for yourself and question authority'." --wikipedia. Social impact (public) and personal LoC (paid-subscriber access).
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Initially the fables were addressed to adults and covered religious, social and political themes. They were also put to use as ethical guides and from the Renaissance onwards were particularly used for the education of children. --wikipedia