In Victor Hugo's "Les Miserables," the author explores the inherent similarities among all humans, emphasizing that we are all made from the same foundational material. He suggests that regardless of our circumstances in life, whether in darkness, during our existence, or in death, we share a common fate. This unity among humanity is fundamental and transcends social and individual differences.

However, Hugo also addresses the notion of ignorance, which he views as a detrimental force that taints the human spirit. This ignorance leads to suffering, and when it resides in the human heart, it gives rise to evil. Thus, while humanity is fundamentally similar, the presence of ignorance can distort our nature and create a divide that contributes to moral failings.