That is sweet of you to say Shaimaa, but I bet someone else will say something more about the movie and also about happiness, I'm really interested in reading what happiness means to all of you and how do you find happiness yourselves! :))))

In addition to my previous comment and about K's questions, The title of the movie refers to the scene where Chris tries to correct the man who is making a graffiti and mispelling the word "Happiness" as Happyness jeje. And Thomas Jefferson is mentioned because his phrase gives the movie its title <a href="http://en.wikipedia.org/wiki/Life,_liberty_and_the_pursuit_of_happiness">http://en.wikipedia.org/wiki/Life,_liberty_and_the_pursuit_of_happiness</a>; - Chris says that maybe Thomas Jeff knew we could only pursuit happiness but never actually have it. But I don't agree with this, happiness is not a dog we have to chase, it's a matter of perspective, of point of view, of attitude. "It is not the mountain we conquer but ourselves" - Sir Edmund Hillary

You know I haven't actually seen this movie but I've heard a lot about it. I assume "happiness" is misspelled because it's trying to say that wealth and education aren't the most important things for being happy. Thomas Jefferson was the third American president, around 1800; he also wrote the Declaration of Independence whose signing in 1776 is the official beginning of the U.S. as a nation independent of England.

Will Smith will always be the fresh prince to me ;)

It was during Jefferson's term that the Louisiana purchase happened. This more or less doubled the geographical size of the U.S.. Also during his term or terms was the Louis and Clark expedition, in which some people (I forget how many) walked all the way across North America and back and wrote journals and so on. Meriwether Lewis and what's his name Clark.

I think Jefferson was of Irish descent. He also fathered one or more children with one of his slaves, Sally Hemmings. I think there are still descendents from this affair who are alive. I'm almost certain he was a signer or ratifier of the U.S. constitution, which was  around 1790 or so, I think. After the Revolutionary War was over. Right? 

Thomas Jefferson was also the first Secretary of State (minister of foreign affairs, roughly, as you probably know). Like he said above, he did and was those things. He was also a scientist to some extent, a scholar, linguist, inventor, and architect or some note. If you look on the back of US nickels (previous to '03 or so I think), there is Jefferson's house which he designed, Monticello, located in Virginia. He also designed some or all of the buildings for the University of Virginia. Another thing about Jefferson: he was hypocrite. He wrote about "all men created equal", and I'm sure said or wrote things against this, but he was a slave-owner, or slave-controller. Under the laws of the time, of course, people were considered to be property.