Why do the edges and corners of a cubes weather faster than faces? hint: (remember that objects with large surface areas weather quickly)

typically edges and corners have less support behind them, think of it like swinging an ax at a tree trunk, versus a smaller branch.

Also, areas with larger surface areas tend to gather get  hit with more "weather" orientated things since there is more area to hit.

i think the answer to your question is: settlement of the interior and economic growth. ( ^_^)／