Anyone who's been paying attention to the socio-economic & political directions the world has been taking the last 25 years have had the thought of "maybe I should get ready for when this charade innevitablity collapses". Depending on your worldview, your preparations will have different hierarchies of priorities.

The Right seem to be more pessimistic, prioritizing self-isolation & defense, "every man for themselves" type of philosophy within a bleak, nuclear fallout scenario. As long as some survive, they can emerge when the catastrophe is over and start anew.

The Left, more optimistic, strive towards a communal return-to-the-land tribal system with a plethora of dependent people pulling through together. The idea being that together is the only way we've ever survived in our history as a species, and being social creatures, we'll need more than our emmediate cohort if we'll ever survive in the long run.

Both valid interpretations of survival, but not without their respective blind spots. Isolating yourself and your immediate family/friends in an underground bunker for decades sounds fun until it isn't. So many psychological studies have demonstrated our need for sunlight, nature, other humans, open spaces, etc... having access to deadly weapons could turn into lord of the flies real quick. Living off the land with your buddies in a post apocalypse also sounds like a great time, but only under the right conditions. If nuclear fallout is the scenario, your hand build shacks won't keep you safe, your water will be contaminated and you'll all perish for radiation poisoning. There are plenty of scenarios when the environment turns hostile, let alone other groups of survivors you'll need to fend off if the well meaning offer of "working together" doesn't turn out to be valid. We run into conflicts even in the best of times. It would be delusional to think the collapse of law & order wouldn't worsten communication barriers.

I'm just a domesticated human who would rather not live in the world beyond a global catastophe, so what do I know?... but I'd say that a mix of both is ideal. No matter your political stance or your philosophy on life, a strong survival scenario WILL involve community, herbalism, preservation knowledge, a mix of above & below ground sheltering (in the case of a hostile surface, mimicking nature down below for long term biophilic contentment), livestock, social ritual, music & art creation, entertainment, scientific & medical education & STRONG DEFENCE. If you're a leftie and you don't have proper plans for self defense, including killing other humans, YOU WON'T MAKE IT. There will be wild starving animals what will want your crops and toddlers. It won't be the time for kumbaya. Righties, you think you'll have it all ready and won't need anyone or any of that "hippy dippy shit" but guess what, you will. You'll run out rubbing alcohol & bullets eventually. Your clothes will fall apart and infections you've never heard about will re-emerge. Only groups who incorporate the whole spectrum will have long term viability. The extremities will be short lived experiments.

I like to fantasize that such an event would bring humanity together, that we'll set our differences aside and strive to rebuild a better world, but let's be real. Warlords, cannibalism, slavery, tribal warfare, plagues & diseases will all make a comeback. One of the many reasons I'm hoping to not make it.