Building a wall to protect oneself is not new, such an act has existed for thousands of years, a good example is the Great Wall of China which is one of the greatest tourist sites in the world. world. This magnificent wall was built over many generations to control borders, control road trade in goods, and keep out unwanted migrants. if such an act worked for our ancestors in the past, I think it would definitely work for modern times. Even though it is an expensive project, countries do it so they can protect and control the border. So that no Afghan or Syrian people invade the country without