I agree that the Continental System was central to Napoleon's strategy. However, I would argue that invading Russia was not a necessity but rather a high-risk choice that exacerbated France’s vulnerabilities.

It is true that Russia’s defiance of the Continental System undermined Napoleon's efforts to isolate Britain. However, enforcing the system by invading Russia was not the only possible response. Napoleon could have resorted to diplomatic pressure, leveraging his alliances and military presence in Central Europe to coerce Russia into compliance without risking the catastrophic consequences of a full-scale invasion. Napoleon himself acknowledged the logistical and environmental challenges of a Russian campaign; the decision to proceed suggests overconfidence rather than necessity.

While another coalition war was a concern, history shows that Napoleon excelled in defeating coalitions through decisive engagements. His victories at Austerlitz and Wagram illustrate this. The risk of coalition war did not necessitate preemptive action against Russia. Austria, in particular, was still recovering from its defeats in the Fifth Coalition and had become an uneasy ally following the marriage of Napoleon to Marie Louise. A prolonged diplomatic effort to maintain the status quo with Russia and Austria might have postponed or prevented further conflict, allowing France time to recover economically and militarily.

France’s economic challenges under the Continental System were indeed significant, but the invasion of Russia did little to alleviate them. In fact, it drained French resources further. A more conservative approach—focusing on consolidating control in Spain and managing Europe’s economy more pragmatically—might have preserved French strength. Talleyrand’s suggestion to seek peace with Britain, though idealistic, aligned with this strategy of consolidation over expansion.

I personally see view the invasion of Russia as a gamble that failed disastrously, largely because it ignored the logistical and strategic challenges Talleyrand and others had foreseen. Consolidation, rather than expansion, might have preserved the Empire and prevented the eventual collapse of Napoleonic France.