Roberts, C. J., dissenting
children would otherwise “suffer the stigma of knowing their families are somehow lesser,” ante, at 15, why wouldn’t the same reasoning apply to a family of three or more persons raising children? If not having the opportunity to marry “serves to disrespect and subordinate” gay and lesbian couples, why wouldn’t the same “imposition of this disability,” ante, at 22, serve to disrespect and subordinate people who find fulfillment in polyamorous relationships? See Bennett, Polyamory: The Next Sexual Revolution? Newsweek, July 28, 2009 (estimating 500,000 polyamorous families in the United States); Li, Married Lesbian “Throuple” Expecting First Child, N. Y. Post, Apr. 23, 2014; Otter, Three May Not Be a Crowd: The Case for a Constitutional Right to Plural Marriage, 64 Emory L. J. 1977 (2015).
I do not mean to equate marriage between same-sex couples with plural marriages in all respects. There may well be relevant differences that compel different legal analysis. But if there are, petitioners have not pointed to any. When asked about a plural marital union at oral argument, petitioners asserted that a State “doesn’t have such an institution.” Tr. of Oral Arg. on Question 2, p. 6. But that is exactly the point: the States at issue here do not have an institution of same-sex marriage, either.
4
Near the end of its opinion, the majority offers perhaps the clearest insight into its decision. Expanding marriage to include same-sex couples, the majority insists, would “pose no risk of harm to themselves or third parties.” Ante, at 27. This argument again echoes Lochner, which relied on its assessment that “we think that a law like the one before us involves neither the safety, the morals nor the welfare of the public, and that the interest of the public is not in the slightest degree affected by such an act.” 198 U. S., at 57.
