No nation was ever founded with greater revolutionary zeal than the Turkish Republic, nor has any undergone more sweeping change in such a short time. In a very few years after 1923, Mustafa Kemal Atatürk transformed a shattered and bewildered nation into one obsessed with progress. His was a one-man revolution, imposed and steered from above. Atatürk knew that Turks were not ready to break violently with their past, embrace modernity and turn decisively toward the West. He also knew, however, that doing so would be the only way for them to shape a new destiny for themselves and their nation. So he forced them, often over the howling protests of the old order

give me a main idea in 1 sentence

The main idea of the passage is that Mustafa Kemal Atatürk led a transformative revolution in Turkey, pushing the nation towards modernity and Westernization, despite resistance from the old order.