Meanwhile, wealthy states like New York, New Jersey, Connecticut, and California were among the least happy, even though their inhabitants have ambition in spades. What does "in spades" mean? 是什麼意思

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I'm sorry I'm not entirely sure how to explain this properly. Using "because" makes the sentence sound very final and states it like a fact "because people are ambitious they are less happy", so maybe the author chose not to use that word because he's arguing something rather than stating a fact. It's hard to tell in just the one sentence what's going on in this article. He seems to be assuming that in general people would think ambitious people are happier because they are generally more successful in life and he's arguing that this is not entirely true. I don't know if this is helpful at all, sorry if I've just confused you further I'm just not sure what you're trying to understand.