"under the sun"...this phrase appears 29 times in the book of Ecclesiastes, and it is used by Solomon to describe what life is like in the human dimension without God. It's what life looks like here in our world.
In this chapter Dr. Bing walks us through Solomon's observation that there's injustice in the world. From shootings to pandemics, iniquity is there. If there is a good God, why does he let bad things happen? Why would he allow them? How do we deal with it?
It's not until the end of the book that Solomon describes how to view life differently, from God's perspective.