The sentence has two major errors (which when spoken seems correct, but when written has a different meaning). firstly, let's see what the correct sentence should be - "it isn't fair that people judge others by their mistakes".

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)

they usually pass federal laws

and sometimes in the elections of the president