Because of civil unrest, severe unemployment, and because of the great famine. Irish people were mostly farmer so they depended on potatoes. Oh and it went on from 1820 to 1870
Germany and Ireland produced the greatest number of immigrants in the nineteenth century because they had deplorable economies and living conditions.
Explanation:
First of all, the Irish passed a sever three-year lapse without crops to feed on, which led them to starve to death. Almost one million Irish died from that shortage of food. So, they emigrated to the U.S. to seek a better life. However, it was very difficult for them because we're one of the poorest immigrants the U.S. had ever had. On the other hand, Germans had a little bit more resources, nevertheless, the political condition of Germany in that time led them to look for a place with more rights, freedom, and condition of life because a revolution and unrest over suspicious behavior impacted them really hard, there were dangerous conditions in Germany at the time.
Just letting you know, I got this answer from the internet. 1) hunter-gathering tribes 2) small towns and nomadic groups 3) city-states and small kingdoms 4) empires 5) nation-states
