In 1979, Alien came out and Sigourney was in it with a bunch a guys. Nobody at that time expected the woman to be the hero, so that was a tradition that started.
“With such evidence, as well as the sealed doorway between the two guardian statues of the King, the mystery gradually dawned upon us. We were but in the anterior portion of a tomb.”
“One out of four people in this country is mentally unbalanced. Think of your three closes friends; if they seem OK, then you're the one.”