The American system is built on the assumption of sustained growth, but with technological breakthroughs like green energy, battery technology, and mRNA vaccines, there is potential for continued growth in the future.
The rise of new technologies tends to be accompanied by violence indirectly or directly, but the stagnation of these technologies seems to be temporary and will eventually be gone. While predictions vary, there is a possibility that the United States may remain the world's economic leader and maintain its impact on scientific innovation and technological advancements throughout the rest of this century.
Tyler Cowen discusses the flaws of Soviet communism and its decentralized incentives that were destructive rather than value maximizing.
The fall of the Soviet Union was due to the build-up of lies, an alienating system, and the creation of an elite class that no longer believed in the system itself. The lack of price incentives led to shortages, a culture of bartered bribes and sexual favors, resulting in the decay of the system.