That is a throwback to a time when Britain had an empire, equating the Roman Empire's "civilising" influence to Britain's own imperial civilising. Nowadays the theme is that the pre-Roman population of Britain already possessed a sophisticated society.
Roman invasion of the Celtic lands was prompted largely by Caesar's lust for gold to finance his political ambitions. The Celts were not a people or a race but part of a pan European, non-racially specific culture. The Celts had a developed culture but it suited Caesar to portray them as savages to justify his slaughter of them.
In fact it seems that they had developed sophisticated calendars and calculating machines for astronomical matters and were a culture which cared for the weak, the elderly and the disabled. Unlike the Romans who exposed children at birth, taking delight in torture and cruelty.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.