One of the leading opponents of the ERA during the 1970s was conservative Illinois lawyer Phyllis Schlafly, left, seen here in 1976, who launched a campaign called Stop ERA and is credited with helping mobilize public opinion against the amendment in some of the states that balked at ratifying it.

One of the leading opponents of the ERA during the 1970s was conservative Illinois lawyer Phyllis Schlafly, left, seen here in 1976, who launched a campaign called Stop ERA and is credited with helping mobilize public opinion against the amendment in some of the states that balked at ratifying it.