OK Steve, so I watched the whole video, "All Watched Over by Machines of Loving Grace - Episode 2 - The Use and Abuse of Vegetational Concepts". What did I think of it? I probably should take more time to digest it but I'll go ahead and take a stab at it.
One thing I found interesting was that the idea of Nature balancing itself became a sort of doctrine of underlying order, that was accepted without proof. "It was like the air", one scientist said. They just believed it. I think they got a lot of things right, like how different elements interrelate. But science got short circuited by feel-good concepts advanced by a few egotistical, charismatic scientists. Overall, the ideas were more idealistic and simplified than reality. A self-correcting, self-balancing Nature is a warm, fuzzy idea. It was depressing to see politicians abuse it to oppress populations. Also, I found the idea of 'Spaceship Earth' not far from my own ideas that Earth is like a very large aquarium!
Overall, I think it illustrates the folly of man, and a slice of time in scientific history. It's easy and perhaps unfair to criticize ideas of the past. What will future man think of our accepted scientific norms?
How does it relate to aquariums? I'm not sure, but I'll throw out some thoughts. We all try to reach balance in our tanks. But balance is in the eye of the beholder. A tank full of hair algae could be said to be in balance. So what we're really after is an idyllic model that stays in our own version of an idyllic state. But balance and perfection is fleeting. I have noted a few times in my aquarium-keeping history when my tank has 'peaked', and thought, "well it's all down hill from here." And it was! So, are all aquariums doomed to fail? I don't think so, but they will always need upkeep to maintain the ideal.
Scrubber steve, I'd like to hear your thoughts. Why did you post the vid? What point would you make that it supports?
I'd also like to hear from anyone else who watched it, and would like to weigh in.