Are less intelligent people happier?  Scientific & philosophical
citations are welcomed.

Here's a recent article about it:

http://www.timesonline.co.uk/article/0,,2099-1793873_1,00.html

Judging by some vey subjuective observations, the less intelligent
seem to bear more children and therefore seem to be having more sex.
So I wonder if this means they are happy or maybe it means that some
darwinian process is at work to make there chances of survivial more
likely.

Ha HA HA! knickers... that was funny.... lol 

sgcjr here's a couple links you may enjoy

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http://www.sciamdigital.com/browse.cfm?sequencenameCHAR=item2&methodnameCHAR=resource_getitembrowse&interfacenameCHAR=browse.cfm&ISSUEID_CHAR=C9473F67-639C-468A-A653-482F7B120FD&ARTICLEID_CHAR=5D516E2E-33A5-4902-91F5-4A2E4743BB3&sc=I100322

 The Pursuit of Happiness; May 1996; by Myers, Diener; 3 page(s)

Compared with misery, happiness is relatively unexplored terrain for
social scientists. Between 1967 and 1994, 46,380 articles indexed in
Psychological Abstracts mentioned depression, 36,851 anxiety, and
5,099 anger. Only 2,389 spoke of happiness, 2,340 life satisfaction,
and 405 joy.

Recently we and other researchers have begun a systematic study of
happiness. During the past two decades, dozens of investigators
throughout the world have asked several hundred thousand
representatively sampled people to reflect on their happiness and
satisfaction with life--or what psychologists call "subjective
wellbeing." In the U.S. the National Opinion Research Center at the
University of Chicago has surveyed a representative sample of roughly
1,500 people a year since 1957; the Institute for Social Research at
the University of Michigan has carried out similar studies on a less
regular basis, as has the Gallup Organization. Government- funded
efforts have also probed the moods of European countries.

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 The Genetics of Cognitive Abilities and Disabilities; May 1998; by
Plomin, DeFries; 8 page(s)
http://www.sciamdigital.com/browse.cfm?sequencenameCHAR=item2&methodnameCHAR=resource_getitembrowse&interfacenameCHAR=browse.cfm&ISSUEID_CHAR=C46F9EA9-3685-47D3-AD7C-928A8F1E921&ARTICLEID_CHAR=18B28BF6-9622-49A4-A06B-C6387D4767C&sc=I100322

People differ greatly in all aspects of what is casually known as
intelligence. The differences are apparent not only in school, from
kindergarten to college, but also in the most ordinary circumstances:
in the words people use and comprehend, in their differing abilities
to read a map or follow directions, or in their capacities for
remembering telephone numbers or figuring change. The variations in
these specific skills are so common that they are often taken for
granted. Yet what makes people so different?

It would be reasonable to think that the environment is the source of
differences in cognitive skills--that we are what we learn. It is
clear, for example, that human beings are not born with a full
vocabulary; they have to learn words. Hence, learning must be the
mechanism by which differences in vocabulary arise among individuals.
And differences in experience--say, in the extent to which parents
model and encourage vocabulary skills or in the quality of language
training provided by schools--must be responsible for individual
differences in learning.

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Buddha says don?t believe what your parents told u, what your teacher
tells u, don?t believe what your custom tradition teaches u. Examine.
Ask questions, Raise Doubts
If its in a particular manner why so? if u honestly ask these
questions u would achieve wisdom.
Intelligence have three levels
Information--you just have the data
Knowledge --you know what that data is about.
Wisdom --u know how to implement that knowledge.
( as there is a big difference between Information, knowledge & wisdom).
Happiness & wisdom go hand in hand.
If intelligence leads to wisdom, intelligence would bring happiness
However if intelligence is still in the stage of information or
knowledge it can never leads to happiness. It only cause an
uneasiness,  an eagerness to grow . To transform that information to
knowledge & knowledge to wisdom. If this goal is not achieved that
intelligence would leads to a void.
Einstein in his last days of life starts writing poems & when asked
about it he said I wasted my life for unnecessary things as what I
wish to achieve I still didn?t get that.
 

So it?s a journey if not fulfilled (half done) u have to suffer.
 wisdom is  one of  the  way to achieve Happiness.

You might wonder to see people who don?t have anything u ask them
anything they don?t have any clue,  but still happy, coz they have
accepted life the way it is. They are following nature?s way, they are
not corrupt. They are as it is as nature made them as they haven?t
lost their individualism & trust me its more difficult to save your
individualism as compare to achieve wisdom.

Conclusion: u follow either way if u r honest & u work for either
attaining wisdom or to save your individualism u would be happy.

Scottish research looked at a group of 416 people born in 1921, who
underwent intelligence tests at the ages of 11 and 79. At the age of
80, the group was also sent a ?satisfaction with life? questionnaire,
which had them assess their current level of happiness.

?We found no association between levels of mental ability and reported
happiness...?

Higher social standing has also been linked to increased happiness.
However, Gow and his co-authors suggest that intelligent people may
also be more concerned about achievement and more aware of alternative
lifestyles, which may lead to dissatisfaction.
...
?Neither childhood IQ, IQ at 80 or any change in IQ over a lifetime
appear to have any bearing on how satisfied you are with how your life
has turned out,? Gow adds. ?Maybe all that is necessary is that you
have the ability to carry out your daily tasks.?

http://mahalanobis.twoday.net/stories/876383/

A philosophical citation:

Thomas Hobbes has a delightful passage in chapter 13 of the Leviathan
in which he states:
"For such is the nature of men that howsoever they may acknowledge
many others to be more witty, or more eloquent or more learned, yet
they will hardly believe there be many so wise as themselves; for they
see their own wit at hand, and other men's at a distance. But this
proveth rather that men are in that point equal, than unequal. For
there is not ordinarily a greater sign of the equal distribution of
anything than that every man is contented with his share."
http://oregonstate.edu/instruct/phl302/texts/hobbes/leviathan-contents.html 

Does that sound like us? 

If so, it would seem that although wisdom  - intelligence -  is
clearly NOT equally distributed, for the individual this is
unimportant to his/her personal happiness or lack thereof.