"It's human nature to keep doing something as long as it's pleasurable and you can succeed at it - which is why the world population continues to double every 40 years"

Peter Lynch's quote highlights a fundamental element of human behavior and its effects on demographics. He emphasizes that humans are inherently motivated by satisfaction and the possibility of success. When an activity or undertaking brings fulfillment and the opportunities of achieving a favorable result appear high, individuals are naturally inclined to pursue it. This habits underpins various human activities, ranging from expert engagements to personal endeavors.

Connecting this concept to population growth, Lynch explains that the innate human drive to engage in satisfying and relatively effective activities contributes to the increasing global population. His declaration indicates that procreation, a basic human impulse, is seen as both a satisfying and successful undertaking from a biological and societal standpoint. The satisfaction stemmed from raising households and the notion of tradition and continuity motivates people to have children, therefore contributing to population development.

The reference of the world population doubling every 40 years acts as a factual backdrop to his observation. While this rate of growth is affected by several factors such as medical developments lowering infant death rates, enhanced incomes, and increased life span, it indirectly shows the concept that people continue to find worth and success in family life. The pleasure related to friendship, the fulfillment from raising kids, and the social norms around household structures all sustain this demographic trend.

Nevertheless, the quote likewise subtly invites reflection on sustainability and the potential consequences of uncontrolled growth. While humanity gravitates towards actions that bring complete satisfaction and success, there needs to be a balance to resolve the pressure that rapid population growth put on resources and environments. Thus, Lynch's observation is not simply a talk about human behavior, but likewise a timely for thinking about the wider implications of such natural inclinations on the world phase.