Imagine what the US government might be doing abroad today, if there had been no push back from its citizens on the Iraq war? Or Vietnam?

Or take a look at the spotlight in the US being shined on immigration and the treatment of asylum seekers, today. Imagine a version of events where there is no such spotlight. That fight is still ongoing, and the outcome is uncertain... but would their situation be better or worse?

The US is also engaged in many, many humanitarian efforts all around the world - that is in part because these efforts are supported by the people.