I'm reasonably sure that the term 'Renaissance' should under no circumstances be used unironically.
Shorthand, Al, Shorthand. 'Renaissance' era Humanism was a thing though as multivaried as it was.
Something like that but the role of a) markets (when talking about printed books) and b) the willingness to accept ideas and, in certain cases, see their utility is important. Darwinian Evolutiuon was accepted by many because it fitted into already accepted ideas about biology (Darwin was not the first to come up with the idea of Evolution after all) but the same is true of Social Darwinism and Specerian Sociology. Will post more later.