Bricks recall the fragmentary foundations of previous civilizations. (tamrynmcdermott.com)
I guess that explains why many previous civilizations collapsed when their local climate changed as well, and their local sources of food and water became unreliable. (realclimate.org)
While the gameplay remains the same hex - based movement system as previous Civilization games, new features include a tech web rather than a tech tree; smarter native enemies that adapt to your actions on their home planet; and greater emphasise on creating unique nations. (jamiex66.com)