Why did the Incas need to expand their empire?

The Incas needed to expand their empire primarily for economic reasons, as conquering new territories allowed them to access valuable resources, such as minerals, agricultural land, and trade routes. Expansion also helped to consolidate power and establish political stability by integrating diverse groups under a centralized authority. Additionally, by expanding their influence, the Incas aimed to spread their culture, religion, and administrative practices, which reinforced their dominance in the region.