>Sorry, what "natural system" exactly are you talking about? The moon doesn't have one in the sense you mean Whether the moon and the earth are part of a natur

>Sorry, what "natural system" exactly are you talking about? The moon doesn't have one in the sense you mean Whether the moon and the earth are part of a natural or unnatural system is irrelevant, so we can omit the word natural for the purposes of this argument. The moon and its interactions with the earth are part of a system. Some parts of the system are understood. For example, the moon's effect on the earth's tides. Mao's sparrows were part of a system. Changing this variable, the sparrow population, impacted one variable that impacted another variable, that impacted another variable. Dead sparrows --> more pests --> less grain --> famine. We can try to predict and speculate all we want, but the only way to know how a system is affected by a variable change is to change the variable and observe the effects. And it can take a very long time before effects reveal themselves, and sometimes they cannot be easily reversed. When introducing an unprecedented change to a system, all we have is uncertainty, so before we introduce that change, it's important to proceed very slowly, and with caution.