I might just go ahead and quote myself:
"One of the principles of writing economic theory is to create a simplified abstraction of reality."
This is from an article by Russell Jacoby in the Chronicle of Higher Education:
"The world is complicated, but how did "complication" turn from an undeniable reality to a desirable goal? Shouldn't scholarship seek to clarify, illuminate, or — egad! — simplify, not complicate? How did the act of complicating become a virtue?"
This is quite clearly not an article about economics (phew). It goes to show how very, very different we've become from the other social sciences and arts. Yesterday I was talking about the development lab at MIT; would they say, "Ah, there's a million and one things that affect the quality of education. I'm going for a drink."? Of course not. Economics seeks to expose in the simplest possible terms the relationships around us. Indeed, the world is complicated; that's why the MIT lab has to perform randomized trials to isolate the effects of programs. It's why theorists create little models of the world.
Contrast this with this characterization from Jacoby:
"The refashioning of "complicate" derives from many sources.... [acaemics] will prize efforts not only to complicate but also to "problematize," "contextualize," "relativize," "particularize," and "complexify.""
In economics we want to know: what you're saying, why you're right, and what could make you wrong. That's about it. One of the most valuable consequences of treating economics as a science is that we parachuted out of this borderline nonsense:
"They will denounce anything that appears "binary." They will see "multiplicities" everywhere. They will add "s" to everything: trope, regime, truth. They will sprinkle their conversations with words like "pluralistic," "heterogenous," "elastic," and "hybridities." A call for "coherence" will arrest the discussion. Isn't that "reductionist"?"
This explains a big part of the schism between positive economics and other social sciences; we are OK with leaving some things out if it helps. When it comes to the policy debate and the normative questions, we have to throw all the other stuff back in, but "it depends" is a conclusion acceptable in positive economic research only if you can tell me exactly how and why it depends.
Jacoby has the neat sign-off:
"The cult of complication has led — to alter a phrase of Hegel's — to a fog in which all cows are gray."
In economics, our judgment cows are gray, but our scientific cows are black and white.