These days, just about every philosophical debate seems to generate a position labeledinternalism. The debate I will be joining in this essay concerns reasons for action and their connection, or lack of connection, to motivation. The internalist position in this debate posits a certain essential connection between reasons and motivation, while the externalist position denies such a connection. This debate about internalism overlaps an older debate between Humeans and Kantians about the exclusive reason-giving power of desires. As we will see, (...) however, while these debates overlap, the new debate is importantly different from the old debate. (shrink)