This leads us to consider three essential issues.

这让我们考虑三个基本问题。

Another essential issue to consider is the  Industrial Revolution's impact on slavery.

另一个需要考虑的重要问题是工业革命对奴隶制的影响。

Thus, the reader, through literary analysis, will still attain his own positive understanding of the essential and inescapable issues pertaining to man.

因此，读者通过文学分析，仍然可以对人的本质和不可避免的问题有自己的积极理解。