https://en.wikipedia.org/wiki/The_Logic_of_Political_Surviva...
With lots of examples of contrary , where multi party system has not devolved in one man shit show.
China's history is more complicated, but is also the product of military conflict following colonial imposition by Japan. To suggest that either country's political system is the outcome of inherent structural weaknesses in multi-party democracy is absurd.
Please note that the comment I replied to has been substantially modified since I posted.
Get rid of money, punish lying, decrease the power of the Executive branch…
Lots to do, but getting rid of the two party system is a pipe dream.
It's not nature, it's the strategic actions of members of those parties to create and protect that system. For example, look at laws in states that make it very difficult for 3rd parties to get on ballots, participate in debates, and then the expensive lawfare against them if they show any signs of life.
> getting rid of the two party system is a pipe dream
It certainly won't happen tomorrow, but the best time to start such things is today.
As we seem to be seeing, the Democratic Party in the U.S. is in fact, internally, two parties. As populations age out, we'll likely see the party itself evolve.