Gaullism (Gaullisme) is a French political ideology based on the thought and action of Charles de Gaulle.
Foreign critics, particularly in the United Kingdom and the United States, derided and resented de Gaulle's policies of independence they called "of grandeur". A major point of friction was de Gaulle's decision to withdraw France from the integrated military command of NATO (but not from NATO itself) and to expel NATO from its headquarters at Fontainebleau. De Gaulle refused to allow foreign troops on French soil if these troops were not under French command, a move that greatly angered the United States, which had troops in France at the time and expected French military and foreign policies to be aligned with its own.
Gaullism has sometimes been characterized as a form of populism, since de Gaulle relied heavily on his personal charisma. That is, de Gaulle preferred a direct relationship with the people to parliamentary politics; to some extent, he was scornful of politicians and political games. He resigned after failing to obtain a majority in a referendum on a reform of the French Senate.
Since de Gaulle's death, and the break-up of the UDR, the exact meaning of Gaullism has become somewhat unclear. In 1980s-1990s usage, "Gaullism", or "Neo-Gaullism", referred to the Rally for the Republic (now integrated into the Union for a Popular Movement), Jacques Chirac's center-right party. Chirac has, in the past, adopted both dirigiste and laissez-faire approaches to economics; he now has a pro-European stance after famously denouncing Europeanism in the Call of Cochin. For these reasons, some on the right, such as Charles Pasqua, denounce Chirac and his party as not being "true Gaullists".
There are people on the political left who also call themselves Gaullists. Even Socialist president François Mitterrand, who denounced de Gaulle's way of ruling as a permanent coup d'état, was very intent on keeping the nuclear deterrent and asserting France's independence.