Tatiana Schlossberg, the environmental activist, journalist, and author who recently published a widely shared essay about her terminal cancer diagnosis, has died at 35, the New York Times reports.

Schlossberg was born in New York to artist Edwin Schlossberg and diplomat Caroline Kennedy, the daughter of President John F. Kennedy and Jacqueline Kennedy. Schlossberg was educated at Yale University and the University of Oxford.

She embarked on a career in journalism, working at the New Jersey newspaper the Record and then at the New York Times. In 2019, Grand Central published her book, Inconspicuous Consumption: The Environmental Impact You Don’t Know You Have; a critic for Kirkus wrote, “If fighting climate change can be engaging, fun, and fulfilling, this is the road map.”

Last month, Schlossberg published an essay in the New Yorker about being diagnosed with acute myeloid leukemia, a rare form of blood cancer. “Maybe my brain is replaying my life now because I have a terminal diagnosis, and all these memories will be lost,” she wrote. “Maybe it’s because I don’t have much time to make new ones, and some part of me is sifting through the sands.”

Schlossberg’s admirers paid tribute to her on social media. On the platform X, author and politician Marianne Williamson wrote, “Tatiana Schlossberg said in her essay that she regretted not having the chance to give more to the world. In fact, with her essay she gave so much. It was a masterwork. She touched many, many hearts. She will be remembered by many and may her memory be a blessing.”

And activist Martin Luther King III posted, “With deep sadness, we mourn the passing of Tatiana Schlossberg, a brilliant voice and passionate advocate for our planet. @ArndreaKing and I have been moved by the remarkable courage and grace with which she faced her illness. Her thoughtful writing and commitment to the truth is a powerful legacy that endures. Our deepest sympathies to her family and everyone who was touched by her brilliance.”

Michael Schaub is a contributing writer.