For the sake of its political and social health, Latin America needs more charitable activity, not less. 句子把 not less 独立出来,是为了强调。后面省略了 charitable activity(慈善活动)。也可以放在more 之后直接对比: For the sake of its political and social health, Latin America needs more, not less charitable activity. 回到原级就是:... needs much, not little charitable activity.