Beyond Keen, several other authors have introduced works that either disprove greed vs. grievance theory with empirical data, or dismiss its ultimate conclusion. Authors such as Cristina Bodea and Ibrahim Elbadawi, who co-wrote the entry, "Riots, coups and civil war: Revisiting the greed and grievance debate", argue that empirical data can disprove many of the proponents of greed theory and make the idea "irrelevant". They examine a myriad of factors and conclude that too many factors come into play with conflict, which cannot be confined to simply greed or grievance.