To make my position clear: I woted for "I do not expect global civilisation to collapse, nor do I hope for it to happen in the foreseeable future."
One would have thought it unnecessary to state that one does not hope for a global civilisational collapse, but after having seen some people actually express that hope, I start to wonder why. Is it because they think that "nature" will somehow gain from near (or full?) human extinction?
I do not believe in the Gaia hypothesis, I do not believe that the Earth (or more precisely, the Earth's biosphere) is a "self-regulating and balancing system". That does not deny the existence of both positive and negative feedbacks, but it does posit that the biosphere as a whole is chaotic, and therefore cannot be "self-regulating" nor has it any natural "balance".
History teaches us that civilisations collapse only very rarely (not to be confused with societal collapse, where complex societal structures fall due to outside influences).
The Mayan and the Roman examples are often cited, but the Mayans simply moved away (and their civilisation continued until it was destroyed by the Christian Church), and the Roman empire did lose societal complexity in several large steps starting in the 5th century, but their civilisaton continued and is still going strong today (not least thank to the Catholic Church).
History also teaches us that we humans are incredibly resilient and resourceful. Our current, increasingly global, civilisation has endured and evolved ever more strongly in the last couple of centuries, surviving such mass calamaties as the Gulag, Mao's Great March, the Holocaust, the Bengal Famines, the Khmer Rouge and the Rwandan genocide.
Millions, even tens of millions, of people die of starvation or violence in some corner, while the rest of us eat hamburgers and drive gas guzzlers. That's what history teaches us.
The biggest threat from our current anthropogenic global warming is it's effects on agriculture, with some commentators predicting climate refugees in the hundreds of millions within a few decades. Will that lead to civilisational collapse? Hundreds of millions of refugees on the move will probably result in famine, violence and war. But civilisational collapse?
In short, I don't see it, history does not predict it, logic does not posit it, and hope does not yearn for it.