: The volcano is not just a setting but a "mouth" to the underworld, a bridge between the civilized world and a raw, primitive existence.

: The novel blends an "immemorial" mythical time with contemporary Mexican violence. While phones and cartels (like the Zetas) appear, the social structure often feels stuck in the 17th-century encomienda system, where land ownership is concentrated and power is maintained through fear.

: Soler explores deep-seated social inequalities and xenophobia. The "sons of the volcano" represent a group feared for their perceived violence, yet they are also depicted as a supportive and protective community.