stylistic:style_transfer, structural:expansion
Inequality

While there is a supposed negative correlation between absolute welfare levels and the probability of civil war outbreak, relative deprivation may actually be a more pertinent possible cause. Historically, higher inequality levels led to higher civil war probability. Since colonial rule or population size are known to increase civil war risk, also, one may conclude that "the discontent of the colonized, caused by the creation of borders across tribal lines and bad treatment by the colonizers" is one important cause of civil conflicts.