Soft skill is a knack of interacting with other people; be it in office, or in parties or even in our own homes. In big corporate office environment, it is the soft skill that ranks more than your communication skills.
With better soft skills you can achieve more than communication skills can do.
Soft skill has been important for centuries. Only difference is they were known in different names like helpful qualities, gentleman, friendly person etc.
Soft skills enables your colleagues and friends to trust in you. The more they trust in you the more prominent you are.