Final answer:
In a postindustrial society, information is the most important commodity due to the dominance of knowledge-based industries and the value placed on information processing and management for economic growth.
Step-by-step explanation:
In a postindustrial society, the most important commodity is information. This is because, unlike in industrial societies where tangible goods and manufacturing drive the economy, postindustrial societies value the processing and management of information. Knowledge-based industries, advancements in technology, and the service sector dominate the economic landscape in these societies. Therefore, the ability to access, process, and utilize information effectively becomes critical for innovation, economic growth, and maintaining a competitive edge in a global market.