“for all have sinned and fall short of the glory of God.” (Romans 3:2).
If we never sinned, we would have never fallen short of the glory of God, and so one can only logically conclude that we would still be in the garden of Eden: that place of perfection for which humanity was made.
In what era of man have we not been in search of a perfect world, or something to make this world so. There are many theories on how to make the earth perfect, all of which are flawed, and made by ungodly men (e.g. socialism, Nazism, etc). But all things as such have at least one thing in common, they leave God out of the equation. They are all flawed attempts at a perfect world without God. When will people learn that by God, and no other way, will there be perfection?