Tower: Beginning of the nations (Genesis 11)
God’s post-flood mandate to man was to spread out, populate, and subdue the whole Earth. In direct disobedience to that command, man stays in one place and begins building a monument to himself, the Tower of Babel. God causes this large congregation of people to being speaking different languages. Lack of communication prevents them from further progress on the tower, and the people of each tongue disperse to the four corners of the earth and form the beginning of the nations of the world as we know them today.
Taken from 30 Days to Understand the Bible by Max Anders.