Beginning in the early twentieth century, the terms "left" and "right" came to be associated with specific political ideologies and were used to describe citizens' political beliefs, gradually replacing the terms "reds" and "the reaction". The words Left and Right were at first used by their opponents as slurs. Those on the Left often called themselves "republicans", which at the time meant favoring a republic over a monarchy, while those on the Right often called themselves "conservatives". By 1914, the Left half of the legislature in France was composed of Unified Socialists, Republican Socialists and Socialist Radicals, while the parties that were called "Left" now sat on the right side. The use of the words Left and Right spread from France to other countries and came to be applied to a large number of political parties worldwide, which often differed in their political beliefs. There was asymmetry in the use of the terms Left and Right by the opposing sides. The Right mostly denied that the left–right spectrum was meaningful because they saw it as artificial and damaging to unity. However, the Left, seeking to change society, promoted the distinction. As Alain observed in 1931: "When people ask me if the division between parties of the Right and parties of the Left, men of the Right and men of the Left, still makes sense, the first thing that comes to mind is that the person asking the question is certainly not a man of the Left." In British politics, the terms "right" and "left" came into common use for the first time in the late 1930s in debates over the Spanish Civil War. The Scottish sociologist Robert M. MacIver noted in "The Web of Government" (1947):