Morley was in general opposed to ideas that other external groups had influenced the Maya, but in this case, since the conquest occurred in the "degenerate" Post-Classic phase he found it acceptable.
Morley var generelt modstander af tanken om, at andre eksterne grupper havde påvirket mayaerne, men fordi erobringen fandt sted i den "degenererede" postklassiske periode, anså han det for acceptabelt.