Seventeenth-century proponents of the philosophical school of thought known as mechanism produced numerous arguments that sought to use the principles of mechanism to establish the superiority of monarchies over all other systems of government.
Curious Fact
Why did mechanism produce so many arguments establishing the superiority of monarchy over other systems of government?
Someone Else's Explanation
Maybe the principles of mechanism are in tension with democracy (so the principles of mechanism naturally lend themselves to saying that monarchy is better than democracy).
Author's Explanation
Nah. I bet mechanism works fine with democracy. I bet what happened is that every time a mechanist tried to argue that monarchy was better, the argument would fail (because democracy is actually better), and so someone else would have to come up with a different mechanist argument for why monarch is better.
Evaluate
Even thought the question stem labels this an "argument", it's not easy to find a classic Conclusion + Support structure. It's more natural to talk about this argument in our Explain Curious Fact framework, because it's all about one possible explanation vs. an alternate explanation for some curious fact.
Suppose we say, My conclusion was there was that Kevin is really crying because of the new climate change warnings, but I didn't actually support that with anything.
Similarly, this author doesn't give any premise for why we should believe that it's more likely that mechanism supports democracy and that the plurality of mechanist arguments in favor of monarchy are really just an indication that they kept unsuccessfully trying to prove that monarchy was better.
Goal
We're being asked about the 2nd sentence. We know it's an Opposing idea, because the author follows it with "But it is more likely that ___ ".
We will probably see some language saying that this 2nd sentence described .