On Friday PFAW Foundation joined the Anti-Defamation League and an expansive coalition of religious and civil rights organizations in submitting an amicus brief urging the Supreme Court to rule state-level marriage bans unconstitutional in the four marriage cases before them this term. One specific religious conception of marriage, the signers argue, should not define our nation’s laws on it.

The brief outlines instances in our country’s history in which discriminatory laws have been justified on the grounds of “religious and moral disapproval,” from laws supporting slavery to segregation to discrimination against women. But, the signers note, the Supreme Court has rejected these types of arguments over and over – and should again with regard to the marriage bans.

The brief also takes apart the “religious liberty” arguments of those opposing marriage equality, noting that overturning the bans will not threaten freedom of religion since religious groups will still be able to define what marriage means in their tradition:

[C]ontrary to the arguments of some who defend the marriage bans, invalidating the bans will not jeopardize religious liberty. As an initial matter, the cases before this Court concern whether same-sex couples are entitled to the benefits of civil marriage. Religious groups will remain free, as they always have been, to choose how to define religious marriage and which marriages to solemnize…. Religious liberty should serve as a shield, not as a sword to discriminate against members of a disadvantaged minority group.

This amicus brief was one of a stunning array of briefs filed in the Supreme Court last week in favor of marriage equality, including briefs signed by more than 2,000 clergy; 200 police officers, EMTs, and firefighters; 400 companies, including  forty of the nation’s largest corporations; more than 200 mayors; and more than 300 conservative leaders.