Yeah, I wonder: at what rate do species go extinct without human intervention? Like, if we were responsible for 90% of extinctions or 10% of extinctions, that seems a pretty important distinction. Also, the ratio of “human-caused” to “non-human-caused” extinctions seems like it has the advantage that (I would expect) it would obviate concerns about what counts as different species or not: if one researcher draws the line more finely than another, and hence thinks there are 10x as many species as the other, I expect they’ll produce estimates of ~10x for both the numerator and the denominator, which will cancel out.
Yeah, I wonder: at what rate do species go extinct without human intervention? Like, if we were responsible for 90% of extinctions or 10% of extinctions, that seems a pretty important distinction. Also, the ratio of “human-caused” to “non-human-caused” extinctions seems like it has the advantage that (I would expect) it would obviate concerns about what counts as different species or not: if one researcher draws the line more finely than another, and hence thinks there are 10x as many species as the other, I expect they’ll produce estimates of ~10x for both the numerator and the denominator, which will cancel out.