I don't think this is true in any meaningful sense.  There are famous plays on words which relate Scheme to Algol (The Scheme specifications are 'revised^n reports on the algorithmic language scheme', and I think lexical scope in Lisps probably originated with the Scheme people, but Scheme was the first standard language, anywhere, which took lexical scope seriously: in particular it was the first standard language with first-class continuations. (I'm saying 'standard language' because I'm sure there were research prototype implementations.).

The Common Lisp spec was very long at the time -- I think it was 1100 pages.  It was mostly as long as it was because they decided not to split out what other languages would call parts of the standard library.