"The first is that human beings are, under ordinary circumstances, about as reasonable and decent as they are allowed to be" I'd like to try and understand Gra

"The first is that human beings are, under ordinary circumstances, about as reasonable and decent as they are allowed to be" I'd like to try and understand Graeber's argument but I get stuck here. If you take one glance at history with all of its various wars, raids, riots, revolutions, etc I can't see how one could sustain this claim. For example, did Ghengis Khan act about as reasonable and decent as he was allowed to be? This points to a larger problem I see with much if today's social commentary: taking the existence of an advanced civilization for granted. If you believe that today's society is inevitable and indestructible then you don't need to put any effort into sustaining it and can simply change anything you wish without worrying about the consequences to civilization.