Final answer:
The primary reason we move from one generation to another is evolution, which leads to populations becoming increasingly adapted to their environment through the survival and reproduction of individuals with advantageous genes.
Step-by-step explanation:
The fundamental reason to move from one generation to another is the process of evolution. Evolution occurs due to changes in the genetic makeup of a population over time.
Because individuals within a population vary genetically, some are more suited to the environment and, as a result, are more likely to survive and reproduce. This leads to the propagation of advantageous genes in the next generation. Thus, successive generations become increasingly adapted to their environment.
Moreover, genetic diversity within a population also allows for better resilience when changes occur. If part of a population becomes temporarily isolated, new genes can spread and mix when the groups reunite, creating a population that benefits from advantageous traits developed during isolation.
The Concept of Sustainability
In a broader sense, sustainability and the responsibility toward future generations are integrated into this evolutionary perspective. Indigenous cultures have traditionally considered the impact of their actions on multiple future generations, a concept aligned with recognizing the importance of careful stewardship to ensure continuous adaptation and survival.