The 5 branches of philosophy.
1) metaphysics. (the nature of reality)
2) epistemology. (how we know what we know)
3) ethics. (the nature of good)
4) politics .(how should people live together)
5) aesthetics. (what is beauty)
Religion is a subset of #1 (reality is god). Notice if you want
philosophy, religion and politics are significant parts. Most light
bulbs, by the way, also put out quite a bit of heat.
Nate H.