At the time Poland was divided by partitions (1772-1918) we can not say that Poland as a state exist. Who lived in the area? Poles, Russians, Ukrainians, Belarusians, Prussians, Austrians and Jews lived as neighbors. It was a cultural, religious and language melting pot. Catholics, Protestants, Orthodox and Jews.
Everyone mixed together trying to live in harmony and prosperity.
Not every farmer had enough of the land to feed the whole family, often multi-generational family. It happened that the peasant had family or friends in America to whom they could go. It made things much easier. They had support from loved ones. For instance they were receiving instructions how to get prepared for a long and exhausting journey. What to watch out for, what to do and how to get a ticket for the ship, as well as what to do after arriving in the States. Sometimes farmers even received money from them for a ticket to American paradise. For one person. So they were going and leaving family in hometown. They arranged their lives in America. Tried to settle down and continue bringing the wife with the children. Sometimes it took up to several years before the family met again in exile.