If mountains often caused isolation, what is a likely outcome for civilizations on opposite sides of a range?

• A. They shared a common government.
• B. They spoke the same language automatically.
• C. They developed independently.
• D. They merged into one empire.

Answer: (C)

Geographic isolation from mountains creates separation in populations, limiting movement, trade, and the exchange of ideas. When communities on opposite sides of a range rarely interact, each side faces its own environment, resources, and challenges. Over time, these separate pressures lead to distinct languages, customs, political structures, and technologies. That’s why the most likely outcome is that the civilizations develop independently.

The other possibilities would require regular contact and shared institutions, which physical barriers like mountains make unlikely. Shared governments or automatic language commonality would come from ongoing interaction, while merging into one empire would require substantial integration across the barrier, which mountains typically hinder.