I am just suggesting that this is an example of what the maths tells us, not that it is a useful model. In practice humans accepts some chance of extinction in

I am just suggesting that this is an example of what the maths tells us, not that it is a useful model. In practice humans accepts some chance of extinction in return for an economic benefit. The only problem is as a species we do tend to ignore the long rail risk even when that risk is rather more than zero.