The most accurate evaluation of the impact of feudalism after the fall of Western Rome is:
**Feudalism was an effective protective measure against Germanic tribes.**
This statement reflects the historical context in which feudalism emerged as a response to the instability and invasions that followed the collapse of the Roman Empire. Feudalism provided a system of local governance and military protection, allowing lords to maintain control over their territories and defend against external threats, including those from Germanic tribes.
The other statements do not accurately represent the origins or impacts of feudalism.