Comment by rishi_rt

You might also like Reason and Less by Vinod Goel (MIT Press). He talks about human behavior being an outcome of 4 systems - autonomous, instinctive, associative and reasoning with evolutionary newer systems like reasoning and associative tethered to evolutionary older systems like autonomous (every living organism exhibits some form of autonomous behavior). He describes emotion as some currency that mediates interactions between these systems, and the ultimate selection mechanism for initiating actions.