It is in democracies that multiple political parties are most common, since people are allowed to form differing opinions, which leads to the formation of different parties.
KAY GALLANT: Most Americans approved strongly of the economic growth and improved living conditions during the nineteen twenties. They supported the conservative Republican policies of President Calvin Coolidge. And they had great faith in the country's business leaders and economic system.
HARRY MONROE: The spirit of protest was especially strong in serious American writing during the nineteen twenties. Many of the greatest writers of this period hated the new business culture.
BOB DOUGHTY: Welcome to THE MAKING OF A NATION – American history in VOA Special English.