Read the passage from President Wilson's "Fourteen Points" speech
What we demand in this war... is that the world be
made fit and safe to live in, and particularly that it be
made safe for every peace-loving nation which, like our
own, wishes to live its own life, determine its own
institutions, be assured of justice and fair dealing by the
other peoples of the world as against force and selfish
aggression

they kept back from the wars and didn't want any action meaning wars.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.