0_Apprentice
I am an only child, are there any problems associated with being raised that way?
1_Wizard
no not really.  some children have half-siblings or step-siblings living at the same house or a different house may have a similar family environment to only children.
0_Apprentice
Are there a lot of only children IN the United States?  I feel like other countries usually hyave lots of kids?
1_Wizard
only children were relativily uncommon throughout history 
0_Apprentice
Why is that?  I would think having less mouths to feed would be a good thing?