PARIS (AP) — Kate Millett, the activist, artist and educator whose best-selling work “Sexual Politics” was a landmark of cultural criticism and a manifesto for the modern feminist movement, has died at 82.

Millett’s book was among the most talked-about works of its time and remains a founding text for cultural and gender studies programs. Her impact reached across generations and across borders — and condolences filled social networks in multiple languages Thursday.

Millett died of a heart attack Wednesday while on a visit to Paris, according to a person who spoke on condition of anonymity because he was not authorized to speak for the family. The publishing house that carried her books in French also confirmed her death.