After the end of World War II, the United States was the largest economy in the world and had developed a completely changed and forward thinking corporate world.
Conglomerate: A conglomerates was a large company which owned numerous small companies and brands, dealing in a large range of products and services.
Conglomerates were able to launch multiple products and higher sales meant large investments in the local economy, not to mention more job opportunities. These completely changed the American economy as they were more resistant to recessions and depressions.
Franchise System: A franchise system would let anyone with a certain investment to use the brand, logos and business practices of another successful business. An example of this was McDonald's and KFC.
Thanks to the franchise system, such companies grew rapidly across the United States. Small business owners opened their own local franchises resulting in local economic activity and job creation.