The attending spreadsheet contains data from all 3 levels of diversity and 2 group sizes. Data were collected by JBS, ETA, JG, MH, and NM. The “diversity” column refers to the level of wildtype genetic diversity in the group (L= low, M= medium, H= high). “Number of tester survivors” and “number of wildtype survivors” are the number of tester and wildtype individuals, respectively, who eclosed from that group. Groups in which either the number of wildtype or tester survivors was 0 were excluded from the analysis. “Date” is the date the vial was created. “Genotype combination” describes the complement of wildtype genotypes present in the group; information about specific genotype combinations is available in the Supplemental Information to the paper. “Group size” is the number of first-instar larvae originally added to the vial (72 for small groups, 144 for large groups).