Will Durant answered this question so eloquently in The Lessons of History- I thought tonight would be an appropriate time to review the words he wrote half a century ago.
“Democracy is the most difficult of all forms of government, since it requires the widest spread of intelligence, and we forgot to make ourselves intelligent when we made ourselves sovereign. Education has spread, but intelligence is perpetually retarded by the fertility of the simple. A cynic remarked that “you mustn’t enthrone ignorance just because there is so much of it.” However, ignorance is not long enthroned, for it lends itself to manipulation by the forces that mold public opinion. It may be true, as Lincoln supposed, that “you can’t fool all the people all the time,” but you can fool enough of them to rule a large country.”
“All deductions having been made, democracy has done less harm and more good, than any other form of government. It gave to human existence a zest and camaraderie that outweighed its pitfalls and defects. It gave to thought and science and enterprise the freedom essential to their operation and growth. It broke down the walls of privilege and class, and in each generation it raised up ability from every rank and place.”
“If race or class war divides us into hostile camps, changing political argument into blind hate, one side or the other may overturn the hustings with the rule of the sword. If our economy of freedom fails to distribute wealth as ably as it has created it, the road to dictatorship will be open to any man who can persuasively promise security to all; and a martial government, under whatever charming phrases, will engulf the democratic world.”