Why do humans oppress other humans? Journalist Isabel Wilkerson’s book “Caste: The Origins of Our Discontents” (2020) takes on this colossal question and uncovers startling information. Now, a film from Ava DuVernay sets Wilkerson’s writing in motion. Dorothy Woodend writes. Dorothy is The Tyee's culture editor. Published Friday, Feb. 16, 2024. https://thetyee.ca/Culture/2024/02/16/Origin-Big-Issues-Shine-Small-Moments-Grace/