Final answer:
Las Casas held several prejudices and assumptions despite his defense of Native Americans, including views on their political organization and religious beliefs.
Step-by-step explanation:
Despite Las Casas's vigorous defense of the Native Americans, he still held his own prejudices and assumptions. Firstly, Las Casas believed that the Native Americans lived in a "state of nature" superior to European philosophies. Secondly, he thought that the Native Americans would benefit from organizing themselves along the lines of a modern, European nation-state, suggesting they were politically disorganized. Thirdly, Las Casas saw the Europeans, especially the Spanish, as far more virtuous than the Native Americans. Finally, while Las Casas defended the Native Americans, he also believed that they were heathens who needed to be converted to Christianity.