Determining the Central Theme of Dystopian Struggle

Read the following passage from a dystopian novel:

In the year 2145, society had transformed. Once vibrant cities were now buried under layers of concrete and desolation. The government imposed strict controls on every aspect of life, restricting individual freedoms and enforcing constant surveillance. Citizens were divided into categories based on productivity, with the highest-ranking individuals living in guarded sectors that towered above the crumbling streets below. Among these oppressed masses, a rebellion began to take shape, fueled by whispers of hope and longing for a return to democratic freedoms.

As tensions escalated, the resilience among the downtrodden grew, igniting a fierce determination to reclaim their rights. A network of underground leaders appeared, united by their shared vision of a society free from authoritarian rule. This struggle brought forth stories of courage, sacrifice, and the indomitable spirit of those who dared to dream of a better future.