What event occurred in ireland that led to the mass immigration of irish people to the united states?

There was a potato blight which caused potatoes to become diseased. The vegetable was one of the most used over in Ireland and the peasant class ate it most because it was inexpensive. They also came to the United States because the US government offered free land out west for people to farm. Finally, they came over because it was easy to find work. One of the most famous events the Irish immigrants participated in was the building of the Erie Canal.
    

new ideas form the base for the growth of the people.each time they try to develop, they may discover a new form or abilities of themselves this makes the people satisfied in living their life in a happy way.this makes sense that new ideas of people cn change their live.the ideas, if bring their best, they will be changing their present state.

Absolute !