Napoleon III's steps in the Progressive liberalisation of his empire involved a series of reforms aimed at loosening restrictions on personal freedom, expanding civil rights, and promoting economic growth. These changes included the establishment of a constitutional monarchy, the creation of a parliament with greater powers, and the implementation of free trade policies. One reason behind these changes was to win the support of the middle class and promote economic growth by creating a more stable and prosperous society. Another reason was to catch up with other European powers like Britain and Germany who had already embraced free trade and liberal economic policies. Ultimately, the goal was to strengthen the French Empire by creating a more open and democratic society.