> […] there was basically zero chance Japan would have conquered the US, or any American territory for an extended period of time, without the US invading Japan. So in this sense the war wasn’t purely defensive.
War is only defensive if the attacker is likely to conquer and hold territory for an extended period of time? Well, there go the goalposts as expected, though I could not have predicted that that was where they would go.
> They don't continue until every wrong has been righted. It is far from clear that the us would have entered the Pacific War simply to to defend other countries, even if us strategists wanted to.
Once the US entered the war and thus entered into deeper agreements with allies it was inevitable. The war was never ending once the US righted its own wrongs. It made promises to allies.
If Japan had not attacked Peral harbor, it is possible that the US objectives could have been different.
Once hostilities start, you need either complete submission or a high degree of trust to stop them. This is because there is a large downside risk to stopping prematurely.
By way of analogy, if you are in a fist fight and stop before you know the opponent is down, you may be knocked out yourself
---
There are conspiracy theories (which I don't believe) that the latter two were known, but deliberately permitted to happen.
https://en.wikipedia.org/wiki/Pearl_Harbor_advance-knowledge...
The US was "properly attacked" -- and capital burned -- though whether they were attacked first is a matter of debate.