Polygamous marriage should be legal

Since there were no conditions set up, I will be using this round to state my position and the coming rounds for refutations to Pro's arguments. Contention 1: POLYGAMY IS STRUCTURALLY AN UNEQUAL SYSTEM This is true in many aspects, including the very fabric of relationships. Issues can result from tension in regards to burden of income, conjugal rights, household responsibility, etc. Legally speaking, problems can arise from an asymmetrical balance of power in the relationship. Given the scenario of divorce, how would legal proceedings go? Would each partner have to agree to the divorce? What if spouse A wanted to divorce spouse B, but spouse C didn't want to divorce either of them? Whatever the solution, involved partners would have disproportionate rights. Contention 2: POLYGAMY FAVORS A MALE-DOMINANT SOCIETY Though the decriminalization of polygamy would, in theory, give women as much the opportunity to marry multiple men as it would for men to marry multiple women, in practice, it would work out quite differently. A survey taken of the world's traditional societies reveals that 83.39% practice polygyny (a man marrying multiple women) and only .47% practice polyandry (a woman marrying multiple men). Of those in polyandrous societies, the majority partake in what is known as 'fraternal polyandry', where a group of brothers will marry one woman. Non-fraternal polygamy is 'virtually non-existent in human society'. (. http://www.psychologytoday.com...) This is an inconsistency that naturally places women in a subordinate position and lends support to a male-dominant society due to the structural inequality that polygamy innately holds. Contention 3: POLYGAMOUS FAMILIES HAVE INCREASED RISK FOR GENETIC DISORDERS AND DISEASES Due to the high accounts of inbreeding among polygamous families, they are also at risk for genetic disorders. That includes severe mental retardation, epileptic seizures, and sometimes, even early death. (. http://www.reuters.com...) Additionally, partners in a polygamous marriage have an increased risk for STDs, including HIV/AIDS. (. http://www.eldis.org...) Contention 4: NEGATIVE EFFECTS ON INDIVIDUALS AND SOCIETY Numerous studies conducted attribute polygamous marriages with many negative effects on the children and women involved. The problems associated with polygamous marriage include but are not limited to higher levels of psychological distress, low self-esteem, behavioral problems in children, and low levels of academic success. (. http://stoppolygamyincanada.wordpress.com...) Ultimately, when an individual has a problem and interacts with society, society has a problem. Contention 5: THE DIVERSITY IN POLYGAMOUS RELATIONSHIPS MAKE IT LESS PLAUSIBLE TO RESOLVE ISSUES Due to the complexity and numerous forms the relationship could take (polygynous, polyandrous, polyamorous), the practical legal aspect of polygamy would be quite difficult to overcome. In a marriage with three men and two women, who gets child custody? If one of the partners is in a coma, which of the partners gets to make medical decisions if there is a disagreement? Additionally, what if one man were to marry hundreds of people just to grant them the immigration benefits that marriage to a US citizen provides? Should there be a limit on number of spouses? I will conclude here and look forward to my opponent's arguments.