Poor choice. Animal Farm is way, way more than an allegory of one historical event. It's a broadbrush statement on the kind of people likely to seize power at every opportunity (or if you prefer, the effect unrestrained power has on most people), and a humorous jab at authoritarianism.

The other books mentioned (Gatsby et al.) really require context, but literal pigs sitting down to dinner with powerbrokers is something a 14yo can grasp.