The central conflict isn’t about our capabilities; it stems from simply existing. This series effectively explores the nature of humanity. It presents the concept that divine beings removed our vision—after a long period spent confined below ground (in nuclear shelters)—by demonstrating their power through something akin to "God thunder" – nuclear weapons. Naturally, the term 'nuclear' fades over decades or centuries underground, and predictably, people create a new religion to keep most individuals bound by comforting falsehoods. The core deception within this narrative is that our blindness is meant to protect us, as sight enables terrible actions. However, the world depicted in the show is characterized by power struggles, social inequality, and constant warfare. Ultimately, humans aren’t inherently flawed due to what they can achieve; it's inherent to who we are. That said, those few individuals with good intentions must always maintain a belief that they can be superior—both in action and character—not just compared to the majority, but also for the benefit of everyone.

Source on TMDB