Franklin's experience in Britain strengthened his sense
of being an American.  Though he dressed simply and told jokes,
he was a worldly and sophisticated  person. He knew the most brilliant
men of the time, people like Adam Smith and  Voltaire. Yet, while
in Britain, Franklin realized how little most British  people, even
British leaders, understood or respected Americans. He saw that
 Britain governed the American colonies poorly because they did
not know anything  about the colonies. Most of them had never been
to America or even talked to an  American.
Franklin had been critical of Britain for a long time,
writing essays such as   "Rattlesnakes for Felons" and "Observations
Concerning the Increase of Mankind,  Peopling of Countries, etc."
(both in 1751). In the first, he lambasted the  British government
for sending convicted felons to America, sarcastically  suggesting
that Americans send rattlesnakes in return. In the second, he  criticized
the Acts of Navigation, which restricted American trade to benefit
 British merchants. As a politician in the early 1750s, and an ambassador of
 sorts beginning it the late 1750s, he consistently and persuasively argued
for  American interests and American values. He had begun as a civic
do-gooder in  Philadelphia and was quickly becoming America's most
important patriot.