Many African Americans where still living in poverty, and when the Great Depression hit, many white employers fired around 50% of African American workers. At this time, the KKK was very active too.
Another thing was that certain workers were still living in harsh conditions, so civil rights emerged in acts like strikes.
The best answer would be <span>Understanding how history has affected the lives of people today. If you understand what happened in the past and why, you can know how to prevent bad things from happening today because history often repeats itself. It even exists as a common phrase that history repeats itself</span>
I believe the answer to you question is
Augustus
An innovative way was an improvised vaccination.
This consisted of smearing open cuts of healthy people with substances taken from wounds of sick people (for example sick from smallpox) in the hope that they will undergo a mild version of the disease and when the disease catches them, not die.
The risk was that they could get seriously ill, but the advantage was that on average, they had better survival chances than without this "vaccine"