What is one negative effect that can come from applying modern values to a historical event

The true context of the event is missed and the event is not judged from its time period.

When historians evaluate events they should use the skill of contextualization. Contextualization evaluates the events, values, and beliefs of a time period to truly understand why people did what they did in previous time periods. When a historian doesn't use contextualization, an event will be seen worse than it may have been during the actual time period. It is important to understand racial, gender, and social class interactions when looking at events because these social dynamics change and can be very important to understanding an event.

b.   jim crow laws were enacted in northern states.

the idealization of the rural landscape ; admiration for the beauty of nature ; focus on an individual's inner concerns