hard to say. i really don't know what you have in mind.

but if for some reason each human decided he/she would break ties with all other humans and keep to himself/herself to keep from putting something into "the system," i guess we might find examples of some fishermen eating well for a time, depending on their whereabouts (if they can labor for themselves in their environment within your hypothetical), but humankind wouldn't last too long.

is that what you're asking? if you have other ideas in mind and want to paint a picture, by all means. but can we agree first that humans are social creatures?