In 1916, the Irish nationalist Roger Casement was hanged by the British government for treason. Casement had dedicated his extraordinary life to improving the plight of oppressed peoples around the world--especially the native populations in the Belgian Congo and the Amazon--but when he dared to draw a parallel between the injustices he witnessed in African and American colonies and those committed by the British in Northern Ireland, he became involved in a cause that led to his imprisonment and execution. Ultimately, the scandals surrounding Casement's trial and eventual hanging tainted his image to such a degree that his pioneering human rights work wasn't fully reexamined until the 1960s.