Common Lisp, specifically SBCL. Most popular choice (outside of Clojure and Emacs Lisp?). That's the easy answer. You'll encounter more libraries and online ans

Common Lisp, specifically SBCL. Most popular choice (outside of Clojure and Emacs Lisp?). That's the easy answer. You'll encounter more libraries and online answers/resources which will help any growing pains. Quicklisp is used for package management and quickproject is a great starting point to get you writing lisp asap. Practical Common Lisp is a great introduction to the language. https://www.quicklisp.org/beta/ https://www.quicklisp.org/beta/ https://xach.com/lisp/quickproject/ https://xach.com/lisp/quickproject/