What the author means by saying that he felt resolved to go all lengths is that he was determined to undertake this particular action. To be resolved to do something means to make the choice to follow this path regardless of the consequences. The author emphasizes this intention by saying that he was pushed towards this resolution because of his "desperation."
It's a prediction in the plot of the story. Example: "He knew that bad things were to come." This shows that there was a prediction of things to happen.
Maybe yes because if u have 100 people and ur stuck on an island, You can set up a civilisation over there an live by yourself with ur group and set up a different way of living
