Joseph,
to say that the rishonim and achronim’s statements were never influenced by the times they lived in is simply not true as was pointed out in the “rambam on marriage” thread with a father marrying off his 9 year old daughter.
and “the hoax of global warming” thread about there scientific statements most of wich were clearly wrong and just a product of there times and some of wich they even learn out of psukim such as the chinuch (mitzva 545) saying that no animal ever goes extinct.