The other thing that makes sociology different from those theories, is that for anything more specific/advanced, it needs a system of values.
When you measure magnetic forces or examine the behavior of gravity, you don't need that.
But when you study society, you need to stand on some foundations of what's desired, good etc -- at least in the very basic sense.
And even something as simple "good is what's useful for society" doesn't answer that, because we then can ask "useful towards what end?", etc. Is something like murder justified? What about war? etc.
Those questions are not (and will never be) settled. At the most basic, the different schools come from different such understandings.
When you measure magnetic forces or examine the behavior of gravity, you don't need that.
But when you study society, you need to stand on some foundations of what's desired, good etc -- at least in the very basic sense.
And even something as simple "good is what's useful for society" doesn't answer that, because we then can ask "useful towards what end?", etc. Is something like murder justified? What about war? etc.
Those questions are not (and will never be) settled. At the most basic, the different schools come from different such understandings.