The coin flip in the book is that they had two potential leaders, one of the responsible and the other one pretty sociopathic but charismatic - the nascent society followed the sociopathic, charismatic one.
At any rate there were quite a few more kids than 6 in the book, so pointing at this incident and saying 'see, it would work out' is just silly.
The fact that it's a coin flip is the key aspect of the message Golding wanted to impart. It's chilling, and unsurprising, that reality bears it out.