system
Given the following post, respond as if you're commenting on Reddit:
human
All philosophy is situation?

After reading Victor Frankl's "Man's Search For Meaning" it struck me that the philosophy that came out of the book seemed very much as response to his situation, and that is it no surprise that he didn't adopt a philosophy of something like Utilitarianism instead. This got me to thinking that most if not all philosophy in general comes in response to the world at large or a particular topic of concern at the time of the philosophy's creation and to the author's situation.

So my question, is there any branch of philosophy that basically says there is no real philosophical rules, but rather any number of valid approaches exist depending on your environment or circumstances. I would call something like this "situational philosophy", and i theory your philosophy of life could change as often as your circumstances change. 

Apologies if this questions is unclear.
gpt
You might be interested in *moral particularism* \-- the view that there are no authoritative ethical principles, and that moral judgment consists of nothing more than deliberation about particular cases.