Louis Dembitz Brandeis (; November 13, 1856 – October 5, 1941) was an American lawyer and associate justice on the Supreme Court of the United States from 1916 to 1939. He was born in Louisville, Kentucky, to Jewish immigrant parents from Bohemia (now in the Czech Republic), who raised him in a secular home. He attended Harvard Law School, graduating at the age of 20 with what is widely rumored to be the highest grade average in the law school's history. Brandeis settled in Boston, where he founded a law firm (that is still in practice today as Nutter McClennen & Fish) and became a recognized lawyer through his work on progressive social causes.
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Experience teaches us to be most on our guard to protect liberty when the government's purpose is beneficent. Men born to freedom are naturally alert to repel invasion of their liberty by evil-minded rulers. The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding.