It's not just the voices of justice whose words are omitted or placed in a context that serves the powerful.
Some historical figures get praise where none is due.
Loewen notes that President Woodrow Wilson is often credited with the progressive era reform of women's suffrage. Public pressure, aroused by hunger strikes and other actions of the movement, convinced Wilson that to oppose women's suffrage was politically unwise. Textbooks typically fail to show the interrelationship between the hero and the people. By giving credit to the hero, authors tell less than half the story. Textbooks canonize Patrick Henry for his 'Give me liberty or give me death' speech.