Which System is most open to Tyranny?

Which of these systems are most open to Tyranny? Capitalism, Socialism, or Communism?

Please let me hear your thought on this. Here's mine.
[spoiler]Socialism and Communism by it's definition implies a stronger community, in such a community Tyranny should be far less likely because people are giving what they are owed and humans that are owed the most will be good inventors instead of crooks in a Capitalist society that can chose to have more than what they are owed. This is of course theoretical, people are always going to try and take more in any society, it's a common human mindset that only the wisest of us disregard. In my opinion Capitalism leads to Tyranny easier than the others, it ends up being most oppressive to the community the way I see it.
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I was going to say democracy but out of the three, Capitalism because everything is in control privately. That could lead to arguments and other problems.