Answer:
So they can support his idea and beleif.
Step-by-step explanation:
Banneker made it a point to "freely and cheerfully acknowledge, that I am of the African race." Though not himself a slave, Banneker encouraged Jefferson to accept "the indispensable duty of those who maintain for themselves the rights of human nature," by ending the "State of tyrannical thraldom, and inhuman captivity . When the Bill of Rights was adopted in 1791, the liberties it provided were withheld from the hundreds of thousands of Africans living here in slavery. That same year, a free African-American, Benjamin Banneker, challenged the way blacks were seen and treated by whites in America in a public letter to Thomas Jefferson.