ABSTRACT
Our species occupies one specific ecological niche, so it is reasonable to expect that through the evolutionary process of random variation and nonrandom selection, evolutionary forces would have created an optimal design (i.e., an individual with specific traits that best exploit this niche) that would eventually replace all other designs. Clearly, however, this did not happen as we are not all the same. One of the reasons behind this variation is that in the ecological niche we occupy, there are many sub-niches, and there is no single design which is optimal for all. Accordingly, selection forces have favored variation resulting in consistent differences between people. I will argue, however, that although we are not all the same, there is a single direction for achieving a higher ratio; but each one of us needs to take the path that best fits his/her capacities.
