Conservative economic guru and liberal nemesis Milton Friedman hated intervention of any sort, whether in the market or in recreational drug use.

"Lord, enlighten thou our enemies," prayed 19th century British economist and moral philosopher John Stuart Mill in his "Essay on Coleridge." "Sharpen their wits, give acuteness to their perceptions, and consecutiveness and clearness to their reasoning powers.

We are in danger from their folly, not from their wisdom: their weakness is what fills us with apprehension, not their strength."

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