There is a curious parallel between the 1980s Oxford Tories and the 1930s Cambridge spies. The charming, blond, dishevelled Etonian sybarite Guy Burgess, Kim Philby, Donald Maclean, Anthony Blunt and John Cairncross also emerged from an intimate, all-male, public-school network. Four of them were at Trinity College, with Maclean next door at Trinity Hall. Confident enough to formulate a revolutionary worldview despite being ill-informed, they embraced a utopian cause: Soviet communism. It promised a far-off paradise that they never expected to live in themselves. Working towards it was great fun.

https://www.ft.com/content/85fc694c-9222-11e9-b7ea-60e35ef678d2