What is most annoying is: many of the dictators were installed by "democracies" so that these can continue their unsustainable lifestyles, at the expense of extreme suffering elsewhere.

...and I disagree with the parent's parent's point on progress in philosophy: all three examples are not progress of philosophy but at best influence or application of it, and in the last case did not involve trained/professional philosophers (e.g. Turing was a mathematician/chemist-turned-cryptoanalyst/computer scientist).