The Equal Rights Amendment reads:

Section 1. Equality of rights under the law shall not be denied or abridged by the United States or by any State on account of sex.

Section 2. The Congress shall have the power to enforce, by appropriate legislation, the provisions of this article.

Section 3. This amendment shall take effect two years after the date of ratification.

Definitions of domestic violence as an act committed by a man against a woman would be illegal. Favoring women over men in divorces for no reason other then gender would be illegal. Just about any legal injustice against men in the US would be, at least in theory, solved.

The National Woman's Party introduced the bill in every Congressional session between 1923 and 1970. It gained traction in 1972 and was on its way to to ratification when conservative republicans, prominently Phyllis Schlafly struck it down. There is still an effort to pass the ERA, with support from the Alice Paul Institute, National Council of Women's Organizations, The National Organization for Women, and dozens of other feminist organizations.

Now of course there are always going to be "the wrong kind of feminists" just like there will always be "the wrong kind of MRA," but can we take this as an opportunity to say that there are many feminist organizations working on policies for gender equality for both men and women, and that they, or at least the cause, deserves the support of the Men's Rights community?

Source

Edit: Spelling