Materialism Core is the foundation the Materialism modpack is built on. It ties TerraFirmaCraft's grounded survival to a living, class-based society: powered by Care For Them, it defines six regional cultures — Subarctic, Temperate Forest, Steppe, Tropical Forest, Desert, and Mountain — each with six social tiers whose needs (climate, rainfall, altitude, shelter, heating, clothing, food, and drink) are drawn straight from TerraFirmaCraft and FirmaLife. Villagers rise and fall through the tiers as those needs are met. It also adds items and blocks required for the tech progression of the modpack.

