Think about important decisions in you life: the ones that have the greatest impact on your performance at work and your satisfaction at home. How many of those can you make unilaterally & how many do you have to reach with others through negotiation?
My guess is that, unless you are a complete loner, that you reside in a network of relationships and that these relationships need to be taken into account when making important decisions.
This pertains to work, family, friends. Decisions that effect you both professionally and socially need to be negotiated or risk being derailed. Be smart and reduce friction in your life.
Negotiating skills are much more valuable and useful than just how to get a good deal by acting like a hard-ass. Negotiating wise agreements is the basis of productive cooperative activities.
Negotiation is the basis of conflict resolution skills. Good negotiation skills is the art of letting someone else have your way.
Old style hierarchical organizations and companies are becoming less relevant as entrepreneurial startups rapidly develop new products and services and disrupt industries and legacy companies.
In this new world where direct lines of authority have transformed into networks of collaboration, negotiation has become the primary form of decision-making and a key to management and leadership.
Here is a post on negotiating wise agreements.
For more check out the MBA ASAP online Negotiation Course.