Historians exercise certain qualities of character, such as

impatience
accuracy
honesty
bias

The answer is accuracy. Historians are investigators of the past or people who understand the history of people. With this field, they must have qualities such as being unbiased meaning their work should be accurate, patient, efficient reader, has a skill for logic and critical thinking and reasoning and disciplined.

jim crow law, in u.s. history, any of the laws in which racial was enforced, in the south between the finish of reconstruction in 1877 and the start of the social liberties development during the 1950s.

jim crow was the name of a minstrel routine( jump jim crow) performed starting in 1828 by its creator, thomas dartmouth ("daddy") rice, and by numerous imitators, including on-screen character joseph jefferson.

the term came to be a defamatory sobriquet for african americans and an assignment for their segregated life. the segregation rule was stretched out to parks, graveyards, theaters, and eateries with an end goal to keep any contact among blacks and whites as equivalents.

it was classified on neighborhood and state levels and most broadly with the "separate yet equivalent" choice of the u.s. preeminent court in plessy v. ferguson (1896).

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories