When It Rains, It Pours

What should good game AI do? Is it meant to balance a playing field, and continue to challenge the human player? It seems that the AI is being a bit unfair in this episode. -- Sid Meier's Civilization (Part 17)
Welcome to my first-ever Let's Play. It's my favorite all time computer game, Sid Meier's Civilization.
(Recorded with screencast-o-m...)