The idea of the "American Dream" can be dated back to the book The Epic of America by James Truslow Adams (1931). The author describes the American Dream as
"that dream of a land in which life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement. [...]
It is not a dream of motor cars and high wages merely, but a dream of social order in which each man and each woman shall be able to attain to the fullest stature [...] regardless of the fortuitous circumstances of birth or position.
The character of Daisy reunites every one of those traits. She is the "better and richer"; she has also attained a "fullest stature", and to make things even better for her, she was born under "fortuitous circumstances of birth AND position".
These traits make her quite a desirable woman, especially to a man like Jay who visualizes her more as a piece to complete his American dream puzzle than anything more.
Like the idea of an American dream,...
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