Was one of the first acts in American History that began to limit immigration, showed how Americans were beginning to shift away from the "mixing pot" mentality and moved towards isolationist attitudes and a feeling of superiority over the less wealthy nations of the world. This attitude has continued today and immigration is still a big issue.
The Mali economy is less diverse than the United States economy because while the U.S. economy has 13+ exports, Mali only has three. Mali and North America share the natural resource of gold.
Portugal and Castille
The European exploration of the Americas was dominated by Portugal and Spain.
Children may be neglected, and their work times may not match up, resulting in separation. It may also create conflicts and competition (who can earn more, whether females or males are better workers, etc.). There is also the issue of if one adult has a high positioned job, which may lead to further conflict and jealousy.
Hope this helps! Have a great day :)