2015年美国同性婚姻合法化，是制衡性政治制度背景下不同价值取向的社会力量在同性婚姻问题上长期博弈的结果。作为人类社会始终存在于少数人中的特有现象，当美国同性恋者在法律上取得了与异性恋者平等的地位后，美国国内在同性恋权利问题上的社会共识就成为美国在国际人权领域博弈的武器。
In 2015，the same-sex marriage is legalized in the U.S. As a result of struggle among social forces of different value orientation within a political system of checks and balances. After the homosexuals that is peculiar to a few people gained full equality legally with heterosexuals in the U.S.，the social consensus on gay issue would thus become an important issue in the international human rights agenda promoted by the United States.
