Far Cry 5: 5 Things We Learned From E3 2017
4. You Create & Lead A Resistance
Since you know you're not alone in suffering oppression from the cult, there's only one thing you can do - resist. Obviously you can't do it alone, so you need others, who are also excluded from the society because they don't agree with the Father's rigorous and instrumental treatment of religion.
You built up the resistance just the way you learn about the world - through conversations. You gather more and more allies, until you're able to set the whole of Hope County free.
What's most interesting is that while you level up, your allies do as well. That way rather regular people, who simply want to be left alone, turn from objects to subjects, able to decide about their own destiny.