Throughout the history of the world certain groups have had their time as the foremost power. We had the Egyptians, the Greeks, the Romans, the Ottomans, the British.
Currently the US is the world superpower but, since we can’t tell the future, we don’t know how long this will last.
There are a number of countries throughout the world that are ruled by cruel dictators. We are in the process of removing one such government right now - the Taliban. But there are many others - Iraq, Congo, Zimbabwe.
Whenever the US flexes it’s muscle, such as currently in Afghanistan, people accuse it of trying to achieve world domination but, if all went well, the US would install a friendly democratic regime in Afghanistan and then go home and forget all about that country.
Some people claim that, by installing a “friendly democratic regime”, what the US is actually doing is installing a US controlled puppet-government.
But isn’t it better that power in that country is contested every few years by popular vote than the situation where power is centralised under a president-for-life like Saddam?
Having a president-for-life must be worse than having the ability to kick out the entire government after 4 years if you don’t like them.
Whilst there may be many problems with certain areas of US foreign policy, maybe the US should use its (possibly) short time as the predominant power in the world to spread some good and convert some of the one-party states to democracy. To spread freedom.
Then, if the time should come that some other power becomes predominant, some more tyrannical, cruel power, there will be more countries that have a democratic tradition and therefore more countries to oppose the new tyrants.
I think the problem at the moment is that America (and Europe) jealously guard their freedoms when they should be exporting them.