The fight between those who prefer free markets and those who prefer protectionism and domestic production is a war that has been waged since the time of mercantilism in the 1600's. Adam Smith, Frédéric Bastiat, and many other classical economists of their time fought hard against the idea that markets needed to be controlled extensively by government regulations. They, along with many others, believed that government intervention in the economy produced inefficiency and dead-weight loss.
Is there a moral right to immigrate? The philosopher Michael Huemer argued that humans have a distinct right to immigrate and that any government barring peaceful immigration was violating a basic right. He provided real life examples and analogies that help to understand the logic behind the right to immigrate.