Stoicism is a school of philosophy founded by Zeno of Citium in Athens in the early 3rd century BC. It is a philosophy of personal ethics informed by its system of logic and its views on the natural world. According to its teachings, as social beings, the path to eudaimonia (happiness, or blessedness) is found in accepting the moment as it presents itself, by not allowing oneself to be controlled by the desire for pleasure or by the fear of pain, by using one’s mind to understand the world and to do one’s part in nature’s plan, and by working together and treating others fairly and justly.
Nature (understood also as the universe) is rational and deterministic whose actions aim for survival. The universe is governed by the law of reason. There is no hazardous phenomenon in the natural world nor intention. Everything natural happens for a reason.
Humans are part of the big nature; thus the importance to live according to its plan. Otherwise, human actions can provoke a disequilibrium as it is the case today with climate change, endangered species, floods and storms which are all lethal to humanity. If money is the goal, then nature is overexploited. Since nature is rational and tends to harmony, not to forget that it is much stronger than people.
One day, human actions can wipe out all existence. According to Stoic, this is the peek of human foolishness.