No. It's not exponential. Caring for her own children, she would instill her values as they grow. Her children would most likely get a love of knowledge and a

No. It's not exponential. Caring for her own children, she would instill her values as they grow. Her children would most likely get a love of knowledge and a determination to accomplish long-term tasks. Since she can produce many children, the number of people with these values experiences exponential growth from generation to generation. If she instead outsources love to an immigrant from the third world, that other person will instill third-world values in the children. The likelihood of the children taking after their mother is greatly reduced, down only to any influence of DNA. The culture is not passed on. When fewer than two of the children take after the mother, there is an exponential decline. In general, your direct impact on the world in nothing compared to the impact that your children can have. This likely applies even to the greatest scientists, and without question it applies to a random ordinary PhD.