They all feel unified since moving to America from England, and have officially become a new nation.
Perhaps in the Civil War era, the Dred Scott decision angered Abolitionists as the Supreme Court declared African Americans could not be a US citizen as they were not mentioned as as in the Constitution and that Congress abused their power by abolishing Slavery above the Mason Dixon line and in the New Western territories.
Northerners and famously Fredrick Douglass denounced the court ruling.<span />
My research shows that the domestication of plants started around 9,000 years ago. Fig trees, variety of wheat and peas in the Near East were first 9,000 years ago. Barley and chickpeas around 8,500 years ago. These were followed by rice in asia 8,000 years ago along with potatoe, beans and squash in Central and South America also around 8,000 years ago.
It allows the Government of the United States to "make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution."