This is true, not having a navy has shown itself to be a weakness of many nations/civilizations in the past. And there are also good reasons why this is so. Not having a navy strongly impacts a civilizations ability to maneuver around certain points and go around them. It also limits the ability to trade with other natons. Not to mention the additional value of having the firepower of ships (those that had cannons later on at least).
All three Muslim empires had poor leadership, and this reason led to all of their downfalls. Their economies crumbled and they could not support themselves anymore. The Muslim empires were very strong starting off, but they could not survive over time.
The earliest large cities in colonial North America were located on the northeastern coast. These cities include Boston, New York City and Philadelphia.
When the novel made its first appearance in the 1700s, it appealed
to all classes of people because they could identify with the stories of
everyday life. It felt like they were the people in the novel, which in this
case does have a slice of life genre.
