The main force that drove him was a realization of suffering, and the core of his teachings was an understanding of the nature of suffering. "Enlightenment" in the Buddhist tradition may or may not bear any resemblance to whatever Ueshiba called "enlightenment". The term is commonly bandied about in the west and used for different things. I don't think there's necessarily any commonality there.
True, as in the four noble 'truths'. He then went on to give a basic construct, a way, to prevent it. Thus the eightfold path.
Notice there was no violence in his perceived ways of progress. Notice also that historically that particular religion spread across most of Asia and beyond, at least a third of the world of that time by in a slightly different way to many religions. Without violence yet with a great effect which brought people together and things got more civilized.
But alas then along comes human crazyness and greed etc. and gradually the morals once again decline and suffering follows. Same old cycle.
Then the suffereing can only see violence as the answer as usual and we're back to the game of suffering using violence and the 'protectors of them using violence and this leads to more suffering and blame and calls for revenge and......
A spiral, alas one that goes down and yet the purveyors of it are all logical and right. Oh, and of course let's not forget admirers of violence just in case you understand.
Thank God for Aikido and a glimpse that there could be a better way of doing things.
Just like the old man on the train handling the violent drunk whist the Aikidoka who was ready to attack him got off the train realizing he had yet a lot to learn.