PERFECT pROGRMANNG LANGUAGE

I know

LISP/SICP
PROLOGIC PROGRMMING
LAMBDA THEORY
OBJECT ORIENTED

so what is the perfect programming language?

Serious question. I was about to open a dedicated thread, but this one seems to be fine (if we exclude spam and trolling).

I'm searching for a new programming language to learn. I'd like to have something like python on the speed-of-programming point of view, but with a strong threading model (which totally lacks in python, unfortunately).

Any suggestion?