Based on all criteria - military power, economic influence, cultural dominance - America remains number one, even though other, new players are increasingly challenging it in that role. ↗
Because of new technologies, new wealth, new conditions of domestic life and of international relations, unprecedented criteria and issues are coming up for national decision. ↗
The best source for finding an agent is called Literary Agents of North America. It's a complete list of agents, not only by name and address, but by type of book they represent and by what their submission criteria are. ↗