‘small or even zero’ refers to two different conclusions using two different accounting methods.
‘small’: from the method which spreads out ‘lives saved’ across all contributors in the chain of causality
‘zero’: from the method which only attributes ‘lives saved’ to the final actor in the chain of causality.
Leif provides both accounts, which is why he provides ‘small or even zero’ as his description of the impact.
I agree that it is a little unclear. I think Leif’s argument would be clearer if he omitted the ‘zero’ accounting method, which I don’t think he places much credence in but nonetheless included to illustrate the potential range of accounts of attribution.
Overall, I think that it is accurate of Leif to characterise the impact as ‘small’ if we ought to decrease impact by multiple orders of magnitude is correct.
Leif—thanks for sharing this! I appreciate your explanation of the Wired article, which frankly did convey the impression, for example, that you were arguing for a certain method of aid delivery.
In the letter, you provide some ‘false objections’ to watch out for.
Could you please provide what you think would be the strongest objections to your arguments, and what your response in turn to those would be?