[問題] more good than harm

[spadeking (飛向夢想的彼端～)]

If you look back on the 60s and think there was more good than harm, you're
probably a Democrat. If you think there was more harm than good, you're
probably a Republican.
                                                             ~~Bill Clinton

請問這是什麼意思啊？
我不太能了解more good than harm和more harm than good的意思

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