Is there a better solution instead of a U.S.-Mexico wall?

A border is an imaginary line that draws a distinction between the people either side of it. The apparent existence of such lines allows people to point at the people on their side and say they're good, and claim that those on the other side are bad. Yes, that sounds simplistic, but it's the truth. When economic circumstances mean that people on one side are better off, it then supports attitudes of superiority on the part of the wealthier. It also means those poorer people are likely to want to make money in the wealthier country, to clean their pools and rear their children. (What does it say about a culture that it abuses people from a poorer neighbouring country as being stupid, slow, and superstitious, but at the same time wants them to be responsible for looking after the offspring of the wealthy?) Imaginary lines can create real problems. Look at the map of Africa - all those straight lines are the result of maps being drawn up by white people, and they're straight because they pay no attention to the hisotry, geography, and culture of the areas they cut through. Nigeria got its name from someone who wrote a letter suggesting it to The Times. These arbitrary decisions - about lines, about names - serve to separate us. And separation only ever serves the interests of the powerful. So, naive though it may appear, I'd suggest doing away with plans for the US-Mexican wall, which risks being a costly farce and an embarrassment to future generations.