Yes, of course, too much heat is destructive -
vide Io. But, as you know, heat results from movement of molecules, and molecules need to get around to hook up and make more complex molecules. Too much heat (motion) and they can knock bits off each other - too little and they meet too few potential partners.
Hence we might suggest three phases, better known as Goldilocks and the three bears (who liked porridge).
Phase 1 was too hot and complex molecules could not form.
Phase 2 was just right and primitive life could form.
Phase 3 was too cold and no new complex molecules could form.
Fortunately, Phase 2 quite often lasted a long time and life got a chance to develop and take hold.
Cat
