 In 1912, Simpson became chairman of the committee that was eventually to form the Alaska Native Brotherhood (ANB), and the committee's only non-Tlingit member.He is considered the father of the ANB and also "the father of Land Claims" in Alaska, the long process that led to the Alaska Native Claims Settlement Act (without Metlakatla's participation), long after his death.Simpson is widely known for his famous quotation, uttered to the Tlingit land-claims activist William Paul at the 1925 ANB convention