Christian men can marry more than one wife no bible verses is against polygamy
I feel people make religion and some follow them blindly or as per own self motives. Anyone, irrespective of religion should be allowed to marry however how many people they want. Should be left to personal choice and of the partner(s). If polygamy is allowed and common in one religion, it should be allowed in other religion too.
This is very dangerous for the world. If anyone should be allowed to marry as many people as they want there would be a lot of society anomalies.
Also, due to the fact that sexual activity is something that transfers a lot of diseases it may create pandemia or something that would infect the global population.