IMO it's not just capitalism, per se. It's more that there are three or more times as many humans inhabiting this planet as can be comfortably accommodated. The population explosion predicted in the 1970s is here with us today. Due to the Green Revolution, we're not in the famine situation that was predicted back then. But the Green Revolution has not been without its environmental cost. Runt fish are just one of the more obvious outcomes. What really has me scared to death is nitrogen pollution--something you barely hear of in the news, which is distracted by the, by contrast, benign CO2 global warming.
The degree of nitrogen fixation and the resulting pollution that are the inevitable consequence of the Green Revolution that is staving off global famine are unsustainable. There are already massive "dead zones" in the world's oceans where the world's rivers dump their nitrogen-laden effluent. This is not sustainable, and this particular chicken is far worse than C02 global warming, when it comes to roost.
Note that I didn't say IF it comes to roost. It's WHEN, not IF.
I likely will be dead before this all comes to a head. I hope so. However this works out, it's going to be very nasty.