Passage:
"Recent archaeological discoveries in the Indus Valley have revealed large numbers of standardized weights and measures alongside identical trade seals across widely separated urban centers. This widespread uniformity strongly suggests that the Indus Valley civilization operated under a highly centralized administration. Consequently, historians must revise the long-held assumption that ancient societies in this region were organized solely as loose confederations of independent city-states."
Based on the logical structure of the passage, order the following claims from the foundational evidence (least supported by other claims, providing the raw facts) to the main conclusion (most supported by other claims, representing the ultimate point of the passage).
- 1The archaeological record shows standardized weights and trade seals across the region.
- 2The Indus Valley civilization operated under a highly centralized administrative system.
- 3Historians must revise their assumption that the region's ancient societies were loose confederations.