De-escalation should always be top priority. If you cannot de-escalate, try to run away. If you cannot run away, try to delay the threat and call for help. If you cannot do those either, that is when you fight. (Fighting should only be a last resort.)

There is nothing shameful about avoiding conflict if possible. (Before anyone asks, no, this does not contradict our support for revolution. The Bourgeoisie are historically proven to use violence to suppress the Proletariat. This conflict cannot be de-escalated because class conflict is already ongoing, and the Bourgeoisie will always exploit the Proletariat for profit. The Proletariat cannot simply run away because the Capitalist system is so intertwined in the current society. And Bourgeois threats cannot be delayed because they’re already ongoing. Hence, Revolution and the establishment of the DoTP, being the Proletariat’s self defense, is the only solution against the Bourgeoisie.)

Also, about your imagined scenario, if the apocalypse does arrive and we somehow survive through it, fighting would only be the least of our worries. We would still need resources for food, water, and shelter, as well as other tools and equipment to ensure we don’t just die from illness or from a hostile environment. In a post-apocalyptic scenario, disease and starvation would likely be a way more likely cause of death than getting killed by another person.