The Guggenheim Bilbao describes the painter Alice Neel (1900 — 1984) as “one of the most radical artists of the 20th century.” “A fervent advocate for social justice, humanism, and the dignity of people,” according to the organizers of this career-spanning retrospective, Neel “considered herself a ‘collector of souls’.” When this exhibition entitled Alice Neel: People Come First was presented…