What was a major factor in the failure of mostly command economies?

A major factor in the failure of mostly command economies was their inability to efficiently allocate resources and respond to consumer needs. Centralized planning often led to mismanagement, shortages, and surpluses, as decision-makers lacked the localized knowledge necessary to meet demand effectively. Additionally, the lack of competition stifled innovation and productivity, resulting in economic stagnation. These systemic issues ultimately undermined the sustainability of command economies.