‘People are not entitled in a civil society to pursue a malicious campaign of character assassination based on a big lie.’ This was Andrew Clark, son of the historian Manning Clark, expressing understandable outrage on behalf of his family. The issue was the infamous allegation, based on nebulous evidence, that Manning was ‘an agent of Soviet influence’ and had been awarded the Order of Lenin. Unfortunately, as the Clarks will know, the big lie, even when refuted, spreads across generations. Although the onus is supposed to be on the accusers to prove their allegations, in reality it is easily, plausibly reversed.