Stress is an increasing concern since it is more prevalent in our lives today than it has been
             in the past due to many of our traditional avenues of dealing with stress being no longer readily
             available to us as well as the many new stresses caused by modern life. These include the
             increasing crowding of today's cities, the fact that the stresses in today's life are largely implied
             and that there is no physical way to take them out as well as anticipation often being more stressful
             In today's increasingly urbanized world one can see that people are becoming more
             crowded together, and so stimuli such as noise are amplified by the close proximity to one another.
             People in the city tend to be overstimulated however, and this causes them to try to block out
             whatever excess they can, such as ignoring people who they see walking down the street. The
             overcrowding in today's gargantuan cities has amplified the problems of substance abuse,
             alcoholism, crime and mental illness in comparison with areas that have the population density of
             rural areas and villages. This was shown although to quite an extreme in a study performed by
             John Calhoun at the United States National Institute Of Mental Health in which he let loose a half
             dozen pregnant female rats into a quarter acre pen sufficient for supporting 5000 rats. Though
             even after 3 years, the population had never risen over 150, this was due to some of the first
             generation males staking out large claims to the territory, and forcing the remainder, aside from
             their mates to live in a huddled mass. In this huddled mass chaos ensued, with groups forming to
             beat others at random, some becoming cannibalistic or showing homosexual behaviour and some
             becoming completely passive and withdrawn. After Calhoun had terminated the experiment he
             came up with a term for the huddled mass, which he called a "behavioural sink" (Ogden
             ...