He is the one who stands politically on "Left-Wing". In modern world "Left-Wing" is considered as a light reflection from the concept of “Socialism". "Socialism" is any kind of politics that proposes that wealth shouldn't be distributed upwards to the ever wealthier, but redistributing wealth downwards to the poorer, or sideways, to the middle class. Conservatives/bourgeoisies might not want to recognize this, but any taxation and government spending distributes income in one direction or another: upwards, downwards, sideways or equally.

The term LEFT began in the French Revolution, when the more revolutionary delegates in the National Assembly sat on the left, the undecided in the center (referred to as "the swamp" by both sides), and the pro-aristocracy on the right. The definition of left is always changing, and always depends upon where you stand. In the France of 1789 left-wing politics supported the rise of the bourgeoisie.

Left wing politics doesn't aim to revive a nations / Govt's social strategy, but in a way it does want to revive its ideal: the strategic vision of government that benefits the widest number and kinds of people, instead of trying to corner the benefits for a very small, well-connected, well-heeled minority. That's really what left wing politics is about.

It is not about you are a Russian/Chinese/American, Muslim/Christian/Hindu/Buddhist and Black/White. It is not about you are doing "Umra", doing "Mamodesa" and going for a pilgrimage. However, the left wing does usually support choice on doing/being all these things, because the left are for people making their own decisions, not wanting the government/Religion/Church to force those personal decisions upon them, i.e. they support peoples' right to make their own choices.

But these issues are diversions from the main agenda of left-wing politics, which has always been more oriented to economic issues, and to civil liberties. It is the social issues that have been used by the Right-wing as political diversions;

• they fear that most people agree more generally with the left on economic issues: equal pay for equal work above all;
• championing the worker so that he is the equal of the boss; taxation that levels differences rather than heightens them;
• social control over institutions, like corporations, which affect everyone by their actions;
• And now substantial action to slow or stop global warming.

Generally, the left aspires to champion the mass of people who don't have very much, the people from whom the corporations and the present government have taken advantage. By concluding, it is a fact that a left never be a blind follower of Communist way of politics, he will be a socialist and to achieve their goals they will choose Democracy as a best political tool.

Additional Reading: -

By bourgeoisie is meant the class of modern capitalists, owners of the means of social production and employers of wage labour. By proletariat, the class of modern wage labourers who, having no means of production of their own, are reduced to selling their labour power in order to live.

“Commune” was the name taken in France by the nascent towns even before they had conquered from their feudal lords and masters’ local self-government and political rights as the "Third Estate". Generally speaking, for the economical development of the bourgeoisie, England is here taken as the typical country, for its political development, France.

[Engels, 1888 English edition - Manifesto of the Communist Party]