The dream of America was a "new world", a "land of opportunity" where if you work hard you will be rewarded. Lots of European settlers came from areas where they worked hours upon hours and got little in return. This meant that upon arriving in America they believe its a new world, we should get the same opportunities as other to succeed.
1. European settlers came from areas of little opportunity
2. America was seen a new world, and such everyone should be given an equal chance to succeed