What’s the main idea in this paragraph I need 2 sentences please

The concept of the "suburbs" was built up by Levitt and Sons, and this concept had become extremely successful, as over  85% of new homes within the United States are in suburban areas- and is has become a staple of American culture.

..Well, you  might want to cut out the "staple of American culture" part. That's just me  talking out my butt.

tearing down the berlin wall.

answer; william penn's approach made the colony diverse by attracting many types of people and religions;