I'm reading Peter Siebel's Coders at Work and most of the interviewed people mentioned they worked with Lisp, wrote Lisp interpreters (this one I get why), doing so many things using Lisp. I'm sure that Lisp wasn't the only programming language at the time, as Fortan, Algol, Pascal, Prolog (very niche) existed at the time, but they are rarely mentioned.
So, it got me wondering why most of the interviewees where so interested in it.
This is an honest question, from a person that has never used Lisp before.