Variety: The different cultures across the empire are allowed to flourish.
Growth: The power is in a period of rapid growth. Many super and mega projects are under way in the empire.
Population & food: They have the largest population in the world. Rather than being a weakness they are able to fully utilise economies of scale with a primarily vegetarian diet to have very good food security.
Negatives
Disputes: Many disagreements in the empire with China and India constantly arguing. This can lead to progress being impeded.
Totalitarian: Law and order is heavily enforced.
Static: Many language with no lingua franca amongst the population. This causes little movement of people across countries.