What events proved the Metternich was correct in his fears?

Prince Klemens Wenzel von Metternich (1773-1859) was one of the most important diplomats of his era. He served as the Austrian Empire's Foreign Minister from 1809 and Chancellorfrom 1821 until the liberal revolutions of 1848 forced his resignation. This marked the high point of Austria's diplomatic importance, and thereafter Austria and Metternich slowly slipped back into the shadows of international diplomacy.

Metternich was heavily criticized in the 19th century as the man who prevented Austria and the rest of central Europe from developing from monarchies to elected governments. He fought against the forces of liberalism and nationalism, basically picking a losing fight against the prevailing mood of the times.however his strategies as a diplomat and statesman were the focus of praise in the 20th century as many historians agreed that Metternich correctly foresaw and worked to prevent Russian dominance in Europe, succeeding where the post-WW2 diplomats would fail 130 years later.