Marx is of the opinion that since ancient times there have been two classes in society : Vulnerable and Exploited class. A key feature in every era is that one class remains the centre to the means of production and the other class remains weak or exploited. Being teased by vulnerable class, dissatisfaction arises in exploited class and thus class struggle situation originates. The society of the era is also modern divided in two great classes- the capitalist and the proletariat group, The conflict is going on in both of these.
The recognition of class struggle :
1. Faith in change.
2. Proletariat group has to be organised
3. Change in the development of the means of production.
4. End of capitalist system by the revolution of proletariat group etc.