That in society, therefore, there is an antagonism of interests, manifesting itself as a class struggle between those who possess but do not produce and those who produce but do not possess. There are many different divisions in society. Divisions of hatred by sex, skin colour, national origin, religion or the amount of money that a person makes, among others. The insecurity of capitalism breeds these hatreds. We must eliminate their breeding ground, before they infect our children.
Socialists see a division of society based upon the means of acquiring wealth.
If you must work for a living then you are working class, if your main income is derived from the work of others then you are a capitalist. This distinction clearly exists. Even though some of us own shares, workers do not have the luxury to quit their jobs and live off investment income. When you analyze society using this class division, many problems that otherwise defy understanding have obvious solutions. Profit is derived by owning.