She moved to Washington D.C. and began a long-term love affair with black actor-boxer Canada Lee, despite the threat of miscegenation laws. She founded Women Against War. She continued after World War II to try to establish a Center for World Peace at Delphi, Greece. When rebuffed by Greek authorities, she purchased Castello di Rocca Sinibalda, a 15th-century castle north of Rome, which she used to support an artists' colony. She died of pneumonia related to heart disease in Rome in 1970.