What is the authors central message about the American dream

Fitzgerald's message about the American Dream in The Great Gatsby is to convey that those who pursue it will never be satisfied and will always keep longing for more.

Explanation:

The American Dream is projected through Gatsby's pursuit of Daisy and his belief in the "green light." His wealth is also another embodiment of the American Dream. Gatsby continues to long for more and his dreams keep on moving ever further away. This is shown in this quote: "Gatsby believed in the green light, the orgastic future that year by year recedes before us. It eluded us then ... "

No matter how humans keep moving towards the green light or the American Dream, it will constantly elude them.

Fitzgerald is saying that those who pursue the American Dream can never be satisfied, because the American Dream entails always striving for something more than what we already have. Gatsby embodies this in the decadent wealth that he is always accumulating, and also in his pursuit of Daisy.