TBF though, when you have been at war almost constantly since 1811 and for 92% of your existence, when you have an economy inextricably interwoven with war and violence and have created systems that can surveill and catalogue virtually everything down to the atomic level, when you have created weapons that could literally destroy all life on earth and then used them... I think you could lay a pretty good claim to being the greatest. After all having better tools for killing is arguably what defines the greatness of empire.