Why did Hippolyte Taine believe France’s defeat by Germany showed a national problem?

Following France’s defeat by Germany in the 1870–71 war, Hippolyte Taine concluded that the loss was symptomatic of a deep-seated "national sickness" within France.1

Taine believed this vulnerability stemmed from systemic political instability, which he sought to investigate by analyzing the historical origins of contemporary France. His research led him to argue that the country’s primary fault was excessive centralization. According to Taine, this centralization had originated during the ancien régime and was subsequently intensified by the French Revolution.1

He contended that the Revolution, rather than fostering liberty, had merely transferred absolute power into more illiberal hands, thereby creating the structural weaknesses that left the nation susceptible to defeat.1