There were many such programs and doctrines. Programs such as the slave trade where people were considered to be animals or property helped bring racial inequality, while doctrines were like those created by Europeans that claimed that other races are biologically less worth than white people, which is why they should be treated differently.
Amazing congrats so big brain
i think you mean antibiotic ... but Alexander Fleming was the one who advanced the antibiotic (world) and was responsible for creating these categories of medicine... this affected the 20th century because millions of people use antibiotics everyday and without them... many diseases would still affect people without a cure
Hi!
President Lincoln instituted the Emancipation Proclamation in response to rebellions occurring in Southern states.
The threat was that if they did not stop, he would end slavery in each and every state which was revolting against the Union.
Hopefully, this helps! =)