After being invited by Ontario Provincial Police Constable, Robert Sheppard, to meet the artist, the anthropologist Selwyn Dewdney became an early advocate of Morrisseau's and was very interested in Morrisseau's deep knowledge of native culture and myth. Dewdney was the first to take his art to a wider public.

Jack Pollock, a Toronto art dealer, helped expose Morrisseau's art to a wider audience in the 1960s. The two initially met in 1962 while Pollock was teaching a painting workshop in Beardmore. As Pollock did not drive, Susan Ross whom Morrisseau had met in 1961 [11] and Sheila Burnford drove Pollock to visit Morrisseau at his home to view more of his works.[10][11] Struck by the genius of Morrisseau's art, he immediately organized an exhibition of his work at his Toronto gallery. One of Morrisseau's early commissions was for a large mural in the Indians of Canada Pavilion at Expo 67, a revolutionary exhibit voicing the dissatisfaction of the First Nations People of Canada wit