According to the chart when did the north's enslaved population grow the most ?

honeslty bro its the same thing

an era of negotiation.

is that an answer to your question?

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.