What are the two major sects of Islam, and what is the main difference between them?

The primary difference in practice comes in that Sunni Muslims mainly rely on the Sunnah, a record of the teachings and sayings of the Prophet Muhammad to guide their actions while the Shiites more heavily on their ayatollahs, whom they see as a sign of God on earth.

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