Answer:
The main idea of "No Witchcraft for Sale" by Doris Lessing is that ignorance about culture and class leads to conflict.
Step-by-step explanation:
The story takes place in Africa, where the people have a traditional, indigenous way of life and belief system, and a white colonial family moves into their community. The white family is ignorant of the cultural practices of the African people and views their beliefs as primitive and superstitious. This ignorance and prejudice leads to conflict between the two groups, and it is only through understanding and respect that they are able to come to a resolution.