I'm just sending out a general call for people who have an interest in the study of writing systems and some knowledge on the subject. Linguists, anthropologists, sociologists (and even philologists if those still exist) are especially invited to reply. As a pump primer, I read the abstract of a 2010 paper that said there is conclusive evidence the Mayan writing system showed signs of deterioration for at least two centuries before the Spanish first landed in South America. This contradicts the established notion that writing systems deteriorate only under trauma or because of external influence. There may well be something analogous to senescence in writing systems. What do people think? Of course, if anyone else wants to raise a different discussion point about writing systems, please go ahead.