What would be a good thesis statement for my intro paragraph?

Question

Effect and Evolution of African Americans in Minnesota

Intro
The first Great Migration occurred after the Civil War and after the 13th amendment was passed. With the passing of the 13th amendment, many African Americans began to leave the South and migrate to other parts of the region.
Many have heard of the second Great Migration of African Americans, which took place in the late 19th century, but many do not know the effect of African Americans on Minnesota, culturally, economically and socially.
Many freed slaves traveled north where societal, as well as cultural norms were more progressive. Unbeknownst to many, Minnesota saw a fair amount of African American migration and is a great example of the evolution of African Americans from the early to mid 1900’s.
The influx of African Americans to Minnesota caused a positive change in the cultural dynamics of the state as well as economic growth. Although African Americans contributed greatly to the rise of Minnesota, they still faced an immense amount of discrimination both in the work place and in their communities.

Answer 1

I think if you turn this part of that sentence into a statement , you will have a good thesis. I would put it after 1900's and leave the next couple of sentence to put into the relevant paragraphs.