In a world of Nations States, the political boundaries between countries are aimed at organizing a manageable and cohesive set of citizens. Legal migration is a standard mechanism for movement of non-citizens between nations and is beneficial for both the migrant and the nation he or she wishes to migrate to, possibly benefiting the nation of origin of the migrant through remuneration sent back and also possibly through a push for improvement in living standards in the country of origin through elevated expectations from returning citizens. Illegal immigration except in cases of imminent threat to an individuals existence provides some value to the migrant, through a better quality of life, but is likely to harm the nation to which he or she migrates primarily due to the absence of a vetting mechanism to determine the potential benefits to the nation from the migrant. In small numbers such illegal migration is unlikely to upend any aspect of the economy of the nation being migrated to, and is unlikely to impact the livelihoods of citizens of that nation, however as the numbers increase, it is likely to have some impact, and this in my opinion is an undue burden on the citizens of the nation. There is a moral dilemma where the migrant might be coming from very poor living conditions and therefore the ethical solution would be accept all such immigrants, however a rational solution obviously wouldn't take in all comers at the expense of the individuals already living in the nation. That being said, the response to this dilemma will vary from individual to individual. The concept of being your brother's keeper will speak to some readers, and that is something everyone should consider in their hearts and minds, and ultimately in a democratic environment, the ethos of the nation will decide which way it wishes to lean. There might be rational solutions which might go completely against the ethical leanings of the majority, or there might be ethical solutions which might counter the rational sensibilities of the masses, or the solutions and the opinions might align, in each case, the decision making process should ideally consider the entirety of the populace that will be affected by the decisions and not just the migrants and their plight.