"Trade and exploiting comparative advantages yields greater utility" is about as hard a law as any.
The side effects must be investigated because that's largely where we are in the public discourse right now. We're in a big adjustment period. We're learning about consequences; good and bad.
Reminds me of Keyne's famous long-run quote.
[1] Which they, in actual fact, very seldom do.
Marx contributed massively to sociology. He contributed nothing of note to economics that's really relevant to this day (not that his effort was not commendable). Sticking to orthodox marxist economics in 2016 is more dogma than science.
Markets aren't forces of nature. That's propaganda.
They did? How so?