"Napoleon had destroyed democracy in France but in the administrative field he had incorporated revolutionary principles in order to make the whole system more rational and efficient."

Napoleon did indeed dismantle the democratic structures that had been established during the French Revolution. However, he also implemented many of the Revolution's principles in his administration. This was done to make the system more rational and efficient.

Here are the steps:

1. Napoleon's Rise to Power: After the French Revolution, France was in a state of political instability. Napoleon Bonaparte, a military general, seized this opportunity to take control of the French government in 1799.

2. Destruction of Democracy: Once in power, Napoleon established a political system known as the Consulate, where he was the First Consul. This effectively ended the democratic rule that had been established during the French Revolution. In 1804, he declared himself Emperor, further consolidating his power.

3. Administrative Reforms: Despite his autocratic rule, Napoleon implemented several administrative reforms based on the principles of the French Revolution. He standardized the legal system with the Napoleonic Code, established a centralized administration, and implemented a merit-based system for the civil service and military.

4. Rational and Efficient System: These reforms were designed to make the administration more rational and efficient. The Napoleonic Code provided a clear and organized set of laws, the centralized administration allowed for more effective governance, and the merit-based system ensured that positions were filled by capable individuals.

In conclusion, while Napoleon did end democracy in France, he also incorporated revolutionary principles into his administration to create a more rational and efficient system.