In 1967, Phyllis Schlafly launched the Eagle Trust Fund for receiving donations related to conservative causes.

As a result of two organizations' activities, 23 state legislatures saw bills introduced condemning the NAU while the Bush and Obama administrations were deterred “from any grand initiatives.”[13] Eagle Forum members have often worked within the Republican Party.

Disputes among Eagle Forum leaders, including some of Schlafly's children, resulted in court battles, starting in 2016.

[16] Leaders of the organizations sued each other over use of organizational mailing lists, use of Schlafly's name and image, and related issues.

[22] It is opposed to a number of feminist issues, which founder Phyllis Schlafly claimed were "extremely destructive" and "poisoned the attitudes of many young women."

[25] After gaining publicity for her book, A Choice, Not an Echo, Phyllis Schlafly began her fight against the ratification of the proposed Equal Rights Amendment (ERA).

Schlafly then reorganized her efforts to defeat its ratification, founding the group "STOP ERA" and starting the Eagle Forum Newsletter.

According to Schlafly, the passage of the ERA could "mean Government-funded abortions, homosexual schoolteachers, women forced into military combat and men refusing to support their wives."

In 1977, STOP ERA protested the Equal Rights Amendment at the 1977 National Women's Conference in Houston, Texas.

At the conference, Phyllis Schlafly teamed up with Indiana State Senator Joan Gubbins to form a "pro-life, pro-family" coalition to voice the conservative opposition to the ERA.

[28] Schlafly also testified against the potentially harmful effects of the ERA before Georgia, Virginia, Missouri, and Arkansas legislatures.

[29] In March 2021, a United States Federal court ruled that the window of time to ratify the ERA had expired and recent efforts by Nevada, Illinois and Virginia to support ratification are "too late to count".