Olaf Frederick Nelson, one of the leaders of the new Mau movement, was a successful merchant of mixed Swedish and Samoan heritage. Nelson was the richest man in Samoa at the time and well-travelled. He was frustrated by the colonial administration's exclusion of native and part-Samoans from governance. Notably, he was one of many who had lost a child to the influenza epidemic of 1919 in addition to his mother, sister, only brother, and sister in-law. Although classified as a European, he considered himself Samoan "by birth, blood, and sentiment."