Something bad happens, and you look for a person to blame. This psychological need to blame a person, not, say, a process or an institution, is a strong characteristic of some cultures but not others. Examine how this custom develops, and is passed on to each new generation.
Finding the person to blame is usually followed by punishing the person. Vindictive, vengeful society. Probably a fractured society has lots of Us versus Them and willingness to see Them suffer.
Is it correlated with the importance of giving credit, the dual of blame? The importance of attaching a person's name, maybe your name to a good deed. Influences things like copyright.