“The greatest crimes in modern history resulted not just from hatred and greed, but even more so from ignorance and indifference”

Simplified Meaning:

Bad things that have happened in recent times weren't only caused by people who were full of hate or were greedy for money and power. A bigger problem was that many people simply didn’t know what was going on or didn't care enough to do anything about it. For example, in World War II, many people ignored the terrible things happening to Jewish people even when they heard rumors about it. Because they didn't act or speak out against it, it allowed those terrible actions to continue unchecked. This teaches us that staying informed and taking action when we see injustice are crucial to preventing bad events from happening. So, we should always try to educate ourselves about what's happening in the world and not ignore problems just because they don't directly affect us.