Disclaimer: Death Note is not mine.
L, Alpha and Omega
Looking back, it was never glory, manifested in the form of his desire to be bequeathed the title of 'God' that had driven Raito to the edge.
Nor was it really justice, that's to say, Raito's own special brand of idealism that declared him the only one fit to judge.
No, it was much more personal, much more human. It was a selfishly competitive mentality that forbade losing. No matter what.
That in this world, there was only one who could come close to competing for his crown is precisely what sharpened Raito to the point of no return.
L.