Which system of government is best?

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So many cultures argue over which government is best for the people. Communism, socialism, monarchy, theocracy, oligarchy, democracy, republic, tyranny, dictatorship, etc. I would say on some level, communism does ideally work. But, I don't think everyone should reap the same benefits, because there are lazy people who just want handouts. Democracy seems to work, but then why did Rome collapse? Puppet government?