Answer: social system and new diversified industry
Explanation:
Based on the text, we can derive the information that in the past, the South was about slavery and secession but that it's dead.
The new South is about union and freedom which represents a perfect democracy, and there is a social system that is closely knitted and compact and a diversified industry. Therefore, Grady is expressing high hopes based on the social system and the new diversified industry.
