Based on Frans de Waal's "Morals without God" prepare a response with specific regard to the following questions:
1. Can there be a naturalistic understanding of morality?
2. Can science give us a fuller picture of ethics?
3. What do primate studies say about moral sentiment in human beings?
4. At the end of de Waal's piece he agrees with Hume that "reason is the slave of the passions"... what exactly does this mean?