Why did the Irish, Chinese, and Mexican immigrate?

I went to http://www.google.com and entered irish immigrate us and got these results:

http://www.google.com/search?q=irish+immigrate+us&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

You can do the same with chinese immigrate us and mexican immigrate us.

=)

Yes... but is there a way to know WHY they immigrated? That's why I'm stuck.

Thank you for using the Jiskha Homework Help Forum. You have already received excellent help from Writeacher so I hope I'm not repeating anything but here are some articles stating WHY immigrants immigrate!

1. http://memory.loc.gov/learn/features/immig/alt/irish.html (Irish)

2. http://memory.loc.gov/learn/features/immig/alt/chinese.html (Chinese)

3. http://memory.loc.gov/learn/features/immig/alt/mexican.html (Mexican)

You can see that essentially all immigrants are looking for a "better" life.