What is one major way that Buddhism changed over time?

Buddhism has not really changed over time. It's main focus has stayed the same. The main focus is to maintain enlightenment and to reach Nirvana. ... Even though many people have lost sight of his teachings, nuns and monks still teach his teachings and still try to find enlightenment in their life to reach Nirvana.

Explanation:

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

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