In the speech, lewis referred to a "great father" and "great chief'. who was this?

The answer is Thomas Jefferson

Explanation:

During interactions with indigenous peoples, Great Father was the title used by the colonial powers in North America during the 19th century to refer to the President of the United States, the Monarch of Canada (It was also possible to refer to the British monarchs King George III and Queen Victoria as "the Great Father" and "the Great White Mother"), the King of Spain or the King of France.

after the civil war, and with the termination of slavery, the south was faced with a big problem; what was supposed to happen and how they were supposed to deal with the freedom and the rights that black people and freed slaves had gained as a result of the north defeating the south and forcing the end of slavery. first, most, if not all, of the workforce of the south came from slaves and they did not have an option to replace the loss of said workforce. second, particularly in the south, people were convinced that black people were lesser, less intelligent, less capable and less smart than whites. this posed a huge problem for them. also, southerners were faced with another issue; freed slaves now had a say in how their lives would be lived and the right to politically choose the way they would be governed. people in the south did not want to accept this, none of this and this opposition and the conflicts that arose from it, not to mention the afereffects of the war, forced the congress of the time to enact and enforce the reconstruction plans that had been proposed by president andrew johnson.