What's the author's deep concern shown in this novel?

Reading Comprehension: Read the quoted parts carefully and answer the questions.    My thoughts were now wholly employed about securing myself against either savages, if any should appear, or wild beasts, if any were in the island; and I had many thoughts of the method how to do this and what kind of dwelling to make, whether I should make me a cave in the earth or a tent upon the earth: and, in short, I resolved upon both, the manner and the description of which may not be improper to give an account of.

What's the author's deep concern shown in this novel?
【正确答案】：

HE SHOWS HIS DEEP CONCERN FOR THE POOR AND THE UNFORTUNATE IN HIS SOCIETY.

【题目解析】：作者对社会上的穷人和不幸的人表示深切的关心。