Let’s turn now to the history of Progressivism, or the social trends “disposed toward adopting new methods in government or education, holding tolerant and liberal ideas, and generally favoring improvement in civic life.” (emphasis added)

First of all, I am not a liberal. I oppose liberalism. I think it is as insipid as it is dishonest. And this is what “progressive” has come to mean in popular speech, liberal… since the latter term has been effectively demonized, with liberals handing conservatives the stick to beat them with.