The nature of injustice is that we may not always see it in our own times. The generations that wrote and ratified the Bill of Rights and the Fourteenth Amendment did not presume to know the extent of freedom in all of its dimensions, and so they entrusted to future generations a charter protecting the right of all persons to enjoy liberty as we learn its meaning. When new insight reveals discord between the Constitution’s central protections and a received legal stricture, a claim to liberty must be addressed. ?

The States have contributed to the fundamental character of the marriage right by placing that institution at the center of so many facets of the legal and social order.

There is no difference between same- and opposite-sex couples with respect to this principle. Yet by virtue of their exclusion from that institution, same-sex couples are denied the constellation of benefits…