Developing resources made people competent because they need to live and learn new ways to grow and become more successful in new ideas and invention. Learning how to grow crops and build houses ( structures to live ) helps people survive and live with some proctection.
Hope this helps!
The ancient Athenians used a democracy, while the U.S uses a democratic republic. So in other words we got some of the democratic part from the Athenians. Hope this helps. :)