[shkkmo]

You are the one who made a strong assertion that the potential for extinction caused by rapid global warming is less than what humans have already caused.

I made relatively few assertions and the ones I did make are basic ecological science. I was pointing out that your strong claim was irresponsible given the plausible possibilities and our limited knowledge.

[ppf]

Not quite. I made the assertion that the ecological damage humans have already caused is much worse than that caused so far by current climate change. We both agree that predicting the further change in climate and its ecological impact is very difficult.

[shkkmo]

> I made the assertion that the ecological damage humans have already caused is much worse than that caused so far by current climate change.

Take a look again at what you are responding too and what you said, it is not at all clear that we're were contrasting past effects on diversity. Indeed, given the topic of the the prospective of rapid global warming causing it is unclear what relevency that point would have.