After Wilson retired from the army, he became an MP and was chief security adviser to the new Northern Ireland government. As such, he became a target for nationalist Irish militants, being identified with the security policies of the Belfast regime, though wrongly with Protestant sectarian attacks on Catholics. He is remembered today in unionist Northern Ireland as a kind of founding martyr for the state.
Wilson's reputation was ruined in 1927 with the publication of an official biography, which quoted extensively and injudiciously from his entertaining, indiscreet, and wildly opinionated diaries, giving the impression that he was some sort of Machiavellian monster. In this first modern biography, using a wide variety of official and private sources for the first time, Keith Jeffery reassesses Wilson's life and career and places him clearly in his social, national, and political context.