The quote highlights a dark sense of joy derived from violence and conquest, suggesting a primal and almost playful attitude towards brutality. The imagery of "stringing up rival kings on trees" evokes a visceral response, indicating a complete disregard for the sanctity of life while illustrating the conquerors' triumph. This reflects a deeper commentary on humanity's capacity for savage behavior, buried under layers of civilization.

In Margaret Atwood's "MaddAddam," such moments illuminate the blurred lines between innocence and savagery. The reference to "rejoicing in piles of heads" reinforces the idea that, in certain contexts, humanity can derive a twisted pleasure from power over others. This sentiment invites readers to reflect on the intrinsic nature of humanity and the fine line between joy and horror, revealing a complexity that exists within the psyche in times of conflict.