Final answer:
James Truslow Adams is referring to the ideal of The American Dream, which encompasses social order and opportunity for all to achieve success based on individual ability and hard work.
Step-by-step explanation:
James Truslow Adams, in the quote mentioned, is referring to the ideal of The American Dream. This concept isn't limited to mere economic prosperity or high wages; it envisions a social order where everyone has an equal opportunity to achieve success and fulfillment according to their abilities and hard work, irrespective of their social class or birth circumstances. The American Dream believes in a society with minimal barriers where life should be "better and richer and fuller for everyone," allowing each individual to reach their fullest potential.