Daniel Defoe was an extraordinary man. Although he never had the benefit of a university education, he spoke six languages and was able to read even more. His curriculum included having been a government spy, a shopkeeper, and a journalist. As the latter, he was employed by both major parties. Of course, serving two lord is impossible, so after he got into trouble with both of these parties, he turned to writing as another means of living. The first major difference between Defoe's work and most other books dating from this time is that Robinson Crusoe is really entertaining, quite exhilarating and at times even amusing to read. This is in sharp contrast to most contemporary novels which stuck to a Spartan diet of unreality and dullness, their only charm lying in the complete strangeness to anything human. Basically, most stories at the time were chronicles of wonderful, magical events, not even attempting to resemble human life at all. Robinson Crusoe was one of the first few books to have characters with whom a reader could actually identify. Therefore, it was very popular and this idea of recognition of oneself in a character in a book is nowadays only discussed when it fails, implying that it now has become a natural 'recipe'
When Defoe decided to write a more realistic novel than was usual at the time, he could have done better that to opt for an uninhabitated island. It is very difficult to make a character seem more realistic when he is completely alone. It is very hard to describe in detail solitude on such a large scale of time and still remain true to realism. Solitude may be something we have all experienced at one time or other, but Robinson's long time completely devoid of any human contact whatsoever and his logical despair is incredibly hard to describe convincingly.
Two. He was sent to the island because he is destined, it is his fate. He could not help it.
By adapting his story to fit the religious climate of the time, Defoe assures himself of the approval of a substantial religious and social group. However, Defoe may solve one problem, but by doing this, he has caused another. After all, how are people to care for a sinner who refuses to acknowledge the signs God sent him? In this lies the great strength of the book; Defoe actually has us care for him.