If you are talking about the one about 1849 it is because they had the plantations and they hadn't gone crazy in with the gold rush. If you are talking about the one of 1929 it is because they kept focused on manufacturing and they on their crop and everyone needed cotton more or less so they couldn't lose money. Also, Georgia is one of the best places to produce silk and wine so everyone was crazy about it so they always sold silk and wine also.
