Changing the Holy Book isn't flexibity but it's forgery.. Our religion is flexible.. Hence polygamy is permitted.. Not forced or encouraged but permitted.. Whether to use this right or not depends on your needs and circumstances..

[quote:] "there are societies where men are absolutely useless. Women do both, giving birth and working. Men just sit there and smoke pipes."

Then women here are in misery and perhaps the kids are given very awkward examples! Why are women married to such men? Their personal choice..