[Ajedi32]

You'll notice I said all sides, not "both". That was intentional. As you say, there are often more than two sides to any one issue, and a near-infinite number of different perspectives once you start considering more than one issue at a time.

For what it's worth, the US actually does have more than two political parties. It's just that our first-past-the-post election system ensures only two of them are able to effectively compete on the national stage at a given time.