Casus belli doesn't matter that much. There is something else that, in lack of a better term I'll call it "salesmanship", is usually at work. It shouldn't be so

Casus belli doesn't matter that much. There is something else that, in lack of a better term I'll call it "salesmanship", is usually at work. It shouldn't be so hard to imagine a crafty sales plan, with ideas catering and hitting the right demographic groups with the most potent methods for each of them, stirring enough force and demand for change on a scale so large that... well, would make handling things in a peaceful manner too difficult, to put it mildly. That scenario is old as humanity itself (or probably older). Sure, that can be prevented (as the article mentions) but that means work and determination, which are more and more difficult to come by as the time passes and the hard lessons fade from memory or loose meaning. People get comfortable, start taking more and more things for granted, and with that less and less thoughts are given to the truly disruptive situations as plausible events. (And speaking of thoughts, unfortunately the reason isn't always at helm; most of the time it gets called there only after, to clean up the mess.)