For me, voting a person out of the tribe would likely not be an option (unless the person suddenly loses their mind and becomes murderous or something outlandish like that). Anybody in my group during a survival situation will be a family member or a good friend of somebody. It's highly unlikely I'll suddenly form a group with total strangers. I don't even plan for a situation where I'm teaming up long-term with total strangers because there are too many unknown variables. I file that in the "ad-lib" category of survival because I have too many other scenarios to occupy my prep time. The useful thing for me to do is to learn techniques for dealing with the person who's not carrying their weight or who's causing undue friction.
Here's a story. I went out with my family to dinner at a restaurant and to the movies afterward. The movies were near my sister's house, centrally located. She had my niece (12) and nephew (17). We showed up at the movies, and my niece and nephew were dressed like it's mid-July. They are wealthy. Suddenly, it became my responsibility to provide them with clothing so they wouldn't be so cold, even though I was coming from 50 miles away. I gave my niece my jacket. I gave my nephew my relatively thick top shirt. I hope I'm never stuck with them in a survival situation. They could easily jeopardize my survival just by being clueless, and I'm not even talking about how my niece is in a rebellious know-it-all stage. However, at least I know the deal beforehand.
This is a good thread.
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If you're reading this, it's too late.