Thanks, Jack! I agree it is unlikely that the most cost-effective ways of increasing human-years are the most cost-effective ways of increasing agricultural-land-years. Brian Tomasik may have listed some of these. However, buying beef decreases arthropod-years the most cost-effectively among the interventions for which Brian estimated the cost-effectiveness, and I estimated GiveWell’s top charities are 2.65 (= 1.69/​0.638) times as cost-effective as buying beef.
Thanks, Jack! I agree it is unlikely that the most cost-effective ways of increasing human-years are the most cost-effective ways of increasing agricultural-land-years. Brian Tomasik may have listed some of these. However, buying beef decreases arthropod-years the most cost-effectively among the interventions for which Brian estimated the cost-effectiveness, and I estimated GiveWell’s top charities are 2.65 (= 1.69/​0.638) times as cost-effective as buying beef.