Final answer:
The original sentence can be rephrased to highlight the key factors that contributed to major political and social changes during the time period.
Step-by-step explanation:
The original sentence can be rephrased as:
Several key factors contributed to the major political and social changes during this time period. These factors included widespread dissatisfaction with political leadership, demands for more government participation and democracy, freedom of the press, demands made by the working class, the rise of nationalism, and the regrouping of established government forces.