SECOND DRAFT (to make more sense in less space).
Notice the odd similarity in the cycle of body armour.
Pre Firearm
	
	
		
		
	
	
	
	
		
		
	
	
Post Firearm
	
	
		
		
	
	
	
	
		
		
	
	
And further down the line somebody will develop atomic laser pistols and people will at first only have red shirts to wear into battle, then a mirored vest of some kind and eventually everyone will resemble Voltron. Its a vicious circle.