Are you really sure you want to be ascribing global trends to the US empire?

Shoot... US imperialism is soft-serve ice cream compared to the empires of history.

Amartya Sen estimated that Indian capitalism killed around 4 million people per year as compared to China's more planned economy. Indian capitalism was maintained by the British and the US as part of "decolonization" and the superprofits reaped from India and ending up in the US are basically public record.

This is a larger total number than basically any older empire you can think of.

Those military bases by and large extend the American security umbrella to protect the host country, not to put its population to the colonial boot and extract wealth.

Oh sweet summer child. Those are forward bases for US imperialism. They have been used to stage and supply every oppressive US war and to control shipping routes. They don't all just sit there doing nothing. How much did Vietnam enjoy the "security umbrella" of US bases, again?

This is just plain dishonest imperislist propaganda.

Yeah they sort of have to tow the line on US foreign policy

US bases are a symptom of already being beholden to the US. The people of Okinawa hate the US base there. It is only there because Japsn was conquered in WWII and surrendered to the US, and the US built it into a satellite for harassing Korea, China, and the USSR.

but it's a far cry from, say, the Boer enslaving natives in South Africa or Alexander the great wiping out populations who defied him.

US imperialism is carrying out a genocide in Gaza right now via their ethnic supremacist proxy and just toppled the Syrian state, which will likely go the way of Libya if it doesn't balkanize first. The US supports its ckient states that engage in slavery, such as the Saudis or Qatat, where South Asian laborers are brought in and their passports stolen.

The US supported apartheid South Africa in a way that is very similar yo how it supports Israel.

The US has a long laundry list of dirty deeds, but overall the US "empire" has led to the longest and wealthiest period of global peace and scientific/technical/social advancement in the history of humankind.

Where is this period of global peace? The US is engaged in constant war. Where is this wealth? If you exclude socialist blocs the trends on poverty reverse. Scientific advancement was global and much of what you could list will have Soviet or Chinese workers behind it.

That doesn't excuse anything but neither is it particularly useful to condition our allegiances on utopian absolutes of moral purities. When we do, evil wins (e.g., see recent election where 10M Democratic voters stayed home).

"If we don't accept evil, evil wins" just listen to yourself, it doesn't even make sense in this simplistic form.

And who are "we"? Your statements place you squarely against those who suffer under global capitalism, dismissive of ongoing genocide. You're basically doing the Stephen Pinker thing, and he is full of shit in addition to being buddy buddy with Epstein.