You mention the "Goldilocks period", it was called that as far back as 50 years ago in a scientific journal I used to read in elementary school. There was a lot of discussion about how that zone might evolve as thresholds were reached and, for the most part, it was right. Over the ensuing decades I've watched the progression and been impressed with the understanding that those scientists had back in the mid 70s, long before anyone else was blowing that horn.