Eric Cline makes a good case that the Bronze Age empires were organized around a “palace economy”, where only certain people (royals & their pals) were even allowed to trade. In some places the sovereign literally owned all the land and people on it.
One can imagine that a series of bad seasons, natural disasters, invasions & other stressors would open a window for revolt.
Yes tin was a factor, yes the “Sea Peoples” were a factor. But you don’t get the wholesale overthrow of so many empires without the common people being at least somewhat welcoming of the invaders (when not happily assisting them!) in throwing off centuries of elite oppression.
One can imagine that a series of bad seasons, natural disasters, invasions & other stressors would open a window for revolt.
Yes tin was a factor, yes the “Sea Peoples” were a factor. But you don’t get the wholesale overthrow of so many empires without the common people being at least somewhat welcoming of the invaders (when not happily assisting them!) in throwing off centuries of elite oppression.