King's work supported Allan Wilson's view that chimpanzees and humans diverged only five million years ago, and King and Wilson suggested that gene regulation was likely responsible for the significant differences between the species.
Penelitian King mendukung pandangan Allan Wilson bahwa simpanse dan manusia berdivergensi hanya lima juta tahun yang lalu, serta King dan Wilson menduga bahwa regulasi gen yang cenderung bertanggung jawab atas perbedaan signifikan di antara spesies ini.