What if the bill of rights had never been added to the constitution to change the constitution

United States government could abuse their people.

Explanation:

The early draft of the constitutions did not provide a clear rules to protect the people from government oppressions.

The bill of rights contained the first tend amendments of the constitution which specifically designed to protect the human rights of US citizens.

The Bill give the people with the right to pursue life, liberty, and happiness. It also explicitly protected people's ability to criticize the government and remove them from the power if they fail to fulfill the will of the people.

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.