In "The Perils of Indifference", author Elie Wiesel wants us to understand that when someone is indifferent to another person's suffering, he or she is equally guilty as the person who is causing the suffering.
Wiesel is appealing to Ethos, or appealing to ethics, when she tries to make it clear that when a person stans idle towards the suffering of another, he or she becomes an accomplice of the crime or harm committed against that person.
Yes, maybe compare capitals or large cities. You still want to have enough information findable, but Australia and England are both very large, and I consider it too broad.
Some sources will state historic events, however if they were written a long time AFTER the events happen it is not credible because the person who wrote the source was not present at the time of the event.