De Montfort’s influence persisted beyond his death, shaping future governance.

Evidence

De Montfort had lighted a fire never to be quenched in English history. … Not less important was his influence upon his nephew, Edward, the new King, who was to draw deeply upon the ideas of the man he had slain. — Winston Churchill, A History of the English-Speaking…, 437

Categorization

• corroborated: 2 independent passages support this claim — Winston Churchill, A History of the English-Speaking…, 437