see, for example, http://www.inference.phy.cam.ac.uk/withouthotair/c19/page_11... - Don’t be distracted by the myth that “every little helps.” If everyone does a little, we’ll achieve only a little. We must do a lot. What’s required are big changes in demand and in supply.
and, of course, we may be talking at cross purposes - there is some middle ground where a large-ish number of small-ish things can help. i am not arguing against maths, but i am saying that our natural assessment of what is significant without actually doing the maths is often misled by absolute values, as here.
anyway, if you haven't read that book, i recommend it.
