Class is unavoidable

Imagine strangers on a desert island. Each of them have only their clothes to call their own. Immediately they will start to form circles of friends. Some people will find food and others  build shelters and others will just sit around. Already  this group is differentiatrd.
At its most basic class and caste are just this sort of differentiation writ large and because people sef organise into different cirvles, class structure will always be with.us.