In 1967, Morgan became a founding member of the short-lived New York Radical Women group. She was the key organizer of their September 1968 inaugural protest of the Miss America pageant in Atlantic City. Morgan wrote the Miss America protest pamphlet "No More Miss America!", and that same year cofounded Women's International Terrorist Conspiracy from Hell (W.I.T.C.H.), a radical feminist group that used public street theater (called "hexes" or "zaps") to call attention to sexism. Morgan designed the universal symbol of the women’s movement––the female symbol, a circle with a cross beneath, centered with a raised fist. The "Oxford English Dictionary" also credits her with first using the term "herstory" in print in her 1970 anthology "Sisterhood is Powerful". Concerning the feminist organization W.I.T.C.H., Morgan wrote: