What enabled the Inca to achieve their notable accomplishments?

The notable accomplishments of the Inca civilization can primarily be attributed to their comprehensive road systems connecting the empire. This extensive network of roads facilitated efficient communication, transportation, and trade across the diverse terrains of the Andes Mountains. It allowed for rapid movement of armies, enabling the Incas to maintain control over their vast territory and manage the resources effectively. The roads also helped in the dissemination of ideas and the integration of various cultures within the empire, promoting unity and coherence among the diverse peoples they governed.

While advanced agricultural techniques, skilled artisanship, and strong alliances may have contributed to the Inca society's overall success, it was the infrastructure provided by the road systems that played a critical role in unifying their empire and enabling administrative efficiency, which was pivotal for their remarkable achievements in governance and expansion.