Think about it for a moment. If Jaufree had hid the amulet better and maybe got some of his Blades to guard it, Martin could've lit the dragonfires the normal way and the Empire wouldn't have had to withdraw all its troops from the other provinces. This'd mean the Empire wouldn't have collapsed nearly as quickly, if at all. The Great War and all of that could've been avoided if Jaufree had been at all careful. Or, you know, they could've sent the amulet to the home of the Blades.
Speaking of Blades, the Emperor could've survived if there were a couple more Blades with him.