Thomas Paine’s Common Sense was important because:
It led to restrictions on print and free speech, which angered colonists even more and hastened the coming of the American Revolution.
It was the first true American newspaper.
It was the first argument for American independence aimed at the average, less educated male colonists, written in plain language anyone could understand.
It attacked the Sons of Liberty as a batch of unruly rabble-rousers and demanded non-violent passive resistance in order to get the English to change their policies.
It was the first call for American independence in print by a member of a colonial legislature.