The world is arranged in such a way because the conditions of nature themselves create a situation in which survival requires contending with many factors – be it the search for food, protection from predators, or competition for limited resources.

Nature's Battle: The Unceasing Struggle for Existence

The world is arranged in such a way because the conditions of nature themselves create a situation in which survival requires contending with many factors – be it the search for food, protection from predators, or competition for limited resources. Every living creature is forced to fight for its existence, as the surrounding environment dictates conditions where some individuals have an advantage over others due to their innate or acquired qualities.

As noted in one source, "The struggle for survival: the environment can affect an individual's chances of survival. All living organisms interact with their habitat, since the environment constitutes food, space, and the necessary conditions for life, including competitors and predators. Thus, not all individuals in any population survive and reproduce..." (source: link txt, page: 1785-1788). It is precisely such conditions, like resource scarcity and the presence of threats from other organisms, that cause natural selection to work by eliminating less adapted individuals.

It is also important to note that the struggle for life predominantly begins with necessities such as foraging for food. One source states: "The struggle for life is, therefore, primarily a struggle for food, and this brings humans closer to the entire animal kingdom. Given this kinship, all human endeavors can be regarded as a particular case of the biological struggle for existence... a context where life defends its existence and then strives to expand it" (source: link txt, page: 81-82). Here it is emphasized that it is the basic needs that compel organisms not only to survive but also to strive for enhancing their life opportunities, despite adverse conditions.

It should also be noted that even in modern interpretations of life, the idea is reflected that every attempt to achieve a better future is accompanied by fierce competition and constant struggle, when "...they all rush toward a single point, where a ray of happiness shines among the clouds. In between them is a dump, a wild, beastly dump... Whoever is weaker is knocked down and lies helplessly..." (source: link txt, page: 1839-1841). Such a depiction of modernity underscores that the system of strict selection not only determines the survival of individual organisms but also permeates all levels of societal life.

Thus, the focus on the struggle for survival is associated with the fact that the fundamental laws of nature operate through competition and limited resources. This also explains why the mechanisms of biological adaptation and natural selection turn life into a constant battle for existence, motivating every living creature to strive not only for survival but also for improving their living conditions.

Supporting citation(s):
"The struggle for survival: the environment can affect an individual's chances of survival. All living organisms interact with their habitat, since the environment constitutes food, space, and the necessary conditions for life, including competitors and predators. Thus, not all individuals in any population survive and reproduce..." (source: link txt, page: 1785-1788).

"The struggle for life is, therefore, primarily a struggle for food, and this brings humans closer to the entire animal kingdom. Given this kinship, all human endeavors can be regarded as a particular case of the biological struggle for existence... a context where life defends its existence and then strives to expand it" (source: link txt, page: 81-82).

"…they all rush toward a single point, where a ray of happiness shines among the clouds. In between them is a dump, a wild, beastly dump... Whoever is weaker is knocked down and lies helplessly..." (source: link txt, page: 1839-1841).