How did the ideals of the enlightenment influence history?

The American and French Revolutions were directly inspired by Enlightenment ideals and respectively marked the peak of its influence and the beginning of its decline.

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b.   jim crow laws were enacted in northern states.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.