> The list of wars and interventions, arms dealing, extradition etc would be far beyond anything China has done.

There's good reason to be skeptical of your claim. The good the US has done is also radically beyond any good that China has done.

Just the lives that the US will save in Africa, tens of millions of lives over time, is beyond anything any other nation in world history has ever done.

During the US lead in the post WW2 era, liberal democracy has flourished around the world under the direct protection and encouragement of the US. That includes nations throughout Europe, Asia, Africa and Latin America. Compare 1935 (or 1850, 1900, 1920, etc) to 2015 when it comes to government systems around the world, violence rates, major armed conflicts, poverty, famine, life expectancy, real incomes, trade, etc. The world has never been better off than it has with the US as a superpower, not even remotely close.

Last time I checked, for 70 years the US has overwhelmingly acted as a defender of liberal democracies, not an antagonist. It conflicts with nations such as Iran (theocracy), Cuba (dictatorship), the Soviet Union (authoritarian party dictatorship), Iraq (dictatorship), Venezuela (dictatorship), North Korea (dictatorship), Russia (dictatorship). Or is the US currently trying to topple Denmark, Finland, Sweden, Canada, Norway, Germany, Netherlands, Japan, Britain, France, Portugal, et al? Did I miss something?

Just the good that the US did for Germany, Japan and South Korea in the post WW2 era alone is more than any other nation has done for the world in the past century.

What does the world look like if China is the sole superpower by contrast? They're going to protect Taiwan's democracy? They're going to set Hong Kong free to become an independent democracy? Right.

China has been a prolific arms dealer for a very long time. The difference between the US and China on arms dealing is per unit cost and who they primarily sell to. Most of the US arms dealing goes to liberal democracies in fact and involves very expensive hardware like the F35 or F16. China exports arms to at least 53 countries and is the world's largest seller of armed military drones; their largest drone clients are all low human rights countries. By contrast the US sells almost zero armed drones to foreign nations.

The 25 nations list of buyers of US arms includes: Norway, UK, Italy, Greece, Canada, Germany, Mexico, Israel, India, Taiwan, Singapore, Japan, South Korea, Australia.

What's the problem exactly with selling democracies arms to defend themselves? I also don't believe the US should be selling arms to Saudi Arabia, that's a black mark the US deserves credit for.

When it comes to war, the Third Indochina War involved several hundred thousand dead between Vietnam and China (including soldiers and civilians). That's a war that China started with Vietnam.

China has been in a constant state of long-term conflict with nearly all of its neighbors over territory. That includes India, South Korea, Indonesia, Vietnam, Japan, Russia, Malaysia and the Philippines. All of China's neighbors are afraid of it, save for North Korea.

China has persistently aided and propped up North Korea, a nuclear armed dictatorship with zero human rights that has been constantly threatening to genocide South Korea for 50 years.

In the last 50 years China completed its cultural eradication of Tibet, a process that took decades.

China quasi peacefully (there was never a choice actually) annexed Hong Kong and has increasingly stripped it of independence and human rights. That process is accelerating right now.

China constantly threatens to use its military to invade Taiwan and regularly takes dramatic actions to keep Taiwan isolated and terrified. They go so far as to threaten foreign nations that interact with Taiwan's leaders at all, and threaten foreign corporations for even mentioning that Taiwan does not belong to China.

China just recently used military force to annex territory the size of France from their neighbors. The US using its superpower military to annex large swaths of territory from its neighbors is unthinkable in the post WW2 era. The US has maintained the longest unarmed border in the world with Canada, precisely because Canada doesn't fear a US effort to annex its territory. None of China's neighbors feel that way, for obvious reasons.