How does the word “unlike” in paragraph 2 function in this article?

A It introduces the idea that Stanton was somehow distinct in her philosophy.

explanation

The word “unlike” highlights that Stanton was unique in certain ways, and that she disagreed with Anthony in terms of focus. The article directly states that the two “remained friends”, so there was no rivalry, and the article does not have the scope to discuss male activists or all feminists who came before her.