Eco's got about as rigorous a definition as you ever see, but it's pretty broad ...

nemomarx 3 months ago | parent | context | favorite | on: 1913: When Hitler, Trotsky, Tito, Freud and Stalin...

Eco's got about as rigorous a definition as you ever see, but it's pretty broad and could easily apply to any nostalgic / conservative movement. (Which is fairly common in authoritarian ones anyway.)