Should he have spoken? By Roger ScrutonIn 1968 the products of the postwar baby boom decided to seize the European future and to jettison the European past. In that same year Enoch Powell delivered to the Birmingham Conservatives the speech known forever after as “Rivers of Blood”: a speech that cost him his political career, and which, on one plausible interpretation, made the issue of immigration undiscussable in British politics for close to forty years. It is a speech that raises in its acutest form the question of truth: What place is there for truth in public life, and...