Meredith Tax, a prominent activist and writer of second-wave feminism who challenged herself, her peers and the world at large to rethink long-held ideas about gender, race and class, has died. She was 80.

Tax died Sunday, according to her friend Frances Kissling, who did not immediately provide additional details. Her death had been announced on Facebook by the activist Ariane Brunet.

"A true activist who could perceive the importance of a women’s struggle anywhere in the world and would make damn sure we would know about it and join the cause," Brunet wrote. 

She was an internationalist and a great friend of the Kurds and the Rojava Revolution.