Karl marx and jean-jacques rousseau tend to agree on at least one thing. they both felt that the primary source of social ills in society was due to the emergence of:

Karl Marx and Jean Jacques Rousseau felt that the primary source of social ills in society was due to the emergence of private property. Karl Marx advocated the abolition of private property and establishment of common social property. Jean Jacques Rousseau also advocated the abolition of private property, and he was claiming that all people are equal in society and that is necessary too set up a concept of a "social contract" which defines the relationship between individual and authorities.

It is important because it creates opportunities and variations in the economy