Actually, in the first place, Islam limits the number of wives before it is allowing to have many!
I don't think, and please correct me if I'm wrong, that there is any other religion that
limits and controls the number of wives to a maximum of four, or to only one wife if no justice can be done to an extra wife!
To my very limited knowledge, again, please correct me if I'm wrong, all other religions by default allow unlimited number of wives and says nothing, again, as far as I know only, about justice towards wives!
I'm 31 and not married yet, simply because I know I cannot properly provide to a wife, which would be unjust to her