Expresiones más formales de las 4 declaraciones de arriba fueron revisadas y validadas por los siguientes científicos:
Debra Lieberman, Ph.D. The University of Miami |
Joshua D. Greene, Ph.D. Harvard University |
Donald Brown, Ph.D. University of California, Santa Barbara |
Oliver Scott Curry, Ph.D. The University of Oxford |
Frans de Waal, Ph.D. Emory University |
Peter DeScioli, Ph.D. Stony Brook University |
Herbert Gintis, Ph.D. The University of Massachusetts, Amherst |
Peter Singer Princeton University |
Jessica Pierce, Ph.D. The University of Colorado |