I come here today to speak not to posterity but to your generation. In a new and changing world you receive the oldest trust of all. George Washington, in his first Inaugural Address, said: "The destiny of the republican model of government is justly considered... as deeply, as finally staked on the experiment intrusted to the hands of the American people." In the years since he spoke the great experiment has prospered. Where we once stood alone, today the sun never sets on free men, or on men struggling to be free. Even where dictators rule, they often find it necessary to use the language of the rights of man and sometimes find it necessary to modify other dictatorships. For our democracy has proven the most powerful secular idea in the history of man. But the record of success does not mean that we will continue to be successful. The spread of freedom does not guarantee freedom will continue to flourish. The fact we have grown does not mean we will continue to grow.