William Cooper was an Australian Aboriginal activist who lived from 1860-1941 and his biography tells how he set a platform for activists to follow right up to 2019 with recent calls for Voice, Treaty, Truth in the Uluru Statement from the Heart. He was the founder of NAIDOC and had the idea for the Day of Mourning for the 150th anniversary of white settlement. He petitioned the King of England for his people only to find that Aborigines were not citizens of Australia. This led to those he mentored like Ps Doug Nicholls taking up the campaign for the 1967 referendum so First Nations People could be counted in the census. He also stood up for persecuted Jews re Kristallnacht in 1938.