What is the correlation between feeling superior and well-being? I have noticed in myself and others, when people perceive themselves as "better off" than the majority of others (e.g., smarter, better looking, higher social status, better brain function, more insight, more capable, etc.) they tend to feel greater  well-being, peace, and self-assurance.


Are there any studies on this? 
Is it just primal parts of the brain being activated? 
If so, how can we activate that without the external circumstance?


EDIT
For example, just found this one: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2430590/
Diener et al's (1999) review in Psychological Bulletin provides an excellent entry point into the well-being literature. It reviews the literature with regards to the many causes and correlates of well-being.

Individual Differences

First, individual differences explain a lot of variance in well-being. This is often seen in terms of personality traits such as neuroticism and extraversion (e.g., see the huge meta-analysis of DeNeve and Cooper, 1998). People with low neuroticism and high extraversion tend to experience more well-being. In relation to social comparison, it may be that these personality traits influence lenses of social comparisons both in terms of the standards that are set and how circumstances are appraised relative to those circumstances.

Discrepancy theories and social comparison

I recommend reading page 282 and 283 of Diener et al (1999) where the authors review discrepancy and social comparison theories in relation to subjective well-being. First the authors mention an early discrepancy theory by Michalos:


  According to Michalos's theory, individuals compare themselves to
  multiple standards including other people, past conditions,
  aspirations and ideal levels of satisfaction, and needs or goals.
  Satisfaction judgments are then based on discrepancies between current
  conditions and these standards. A discrepancy that involves an upward
  comparison (i.e., where the comparison standard is higher) will result
  in decreased satisfaction, whereas a downward comparison will result
  in increased satisfaction.


The authors then discuss how subsequent research has shown the situation to be more complex than originally conceptualised: e.g.,


There is a degree of flexibility in which social comparisons we adopt.
Adopting high expectations and thereby creating a discrepancy does not necessarily induce lower well-being, especially if people feel like they are making progress towards theirs goals.
Comparisons are not just social, but can come from a variety of sources.
There's a difference between short-term and more enduring effects on well-being.


Superiority versus positive social comparison

It is also worth making a distinction between a positive social comparison and superiority.  We might see a positive social comparison as an evaluation of  life circumstances as better than some comparison group. In contrast superiority can be quite close to arrogance. Taken to its extreme we can see superiority as an element in narcissism (e.g., "Has a grandiose sense of self-importance (e.g., exaggerates achievements and talents, expects to be recognized as superior without commensurate achievements" DSM IV-TR). When the basis of such positive self-evaluations is fragile, I believe this can be related to lower or more volatile self-esteem.

Various factors

Although you mention that it is perception, there is research on various measures that you mention. To take a couple:


intelligence: Several meta-analyses suggest the relationship is fairly minimal (e.g., Sigelman, 1981; Wilson, 1967)
social status - income: Diener et al discuss how the relationship between income and well-being is modest at best.


Primal Factors and Brains

I'm not sure how necessary it is to think of the process in terms of brains. Certainly the process of well-being at some level must be explained in terms of biological processes, but I'm not sure if such a level of explanation is required to understand the relationship between social comparison and well-being.

You might want to read about evolutionary perspectives to well-being.
For example, Grinde (2002) discusses this perspective (See reference and PDF below).

Activating without external circumstances

There is a lot of research in positive psychology on how to attain happiness. 
A starting point could be to look at Seligman's ideas around three paths to happiness. Perhaps check out this TED talk by Martin Seligman

References


DeNeve, K.M. &amp; Cooper, H. (1998). The happy personality: a meta-analysis of 137 personality traits and subjective well-being.. Psychological bulletin, 124, 197. PDF
Diener, E., Suh, E.M., Lucas, R.E. &amp; Smith, H.L. (1999). Subjective well-being: Three decades of progress.. Psychological bulletin, 125, 276. PDF
Grinde, B. (2002). Happiness in the perspective of evolutionary psychology. Journal of Happiness Studies, 3, 331-354. PDF
Michalos, A. C. (1985). Multiple discrepancies theory (MDT) Social
Indicators Research, 16, 347-413. 
Sigelman, L. (1981). Is ignorance bliss? A reconsideration of the folk
wisdom. Human Relations, 34, 965-974.
Wilson, W. (1967). Correlates of avowed happiness. Psychological Bulletin, 67, 294-306.