Tony Hsieh addresses the importance of a cohesive unit at companies in his company culture speech. He argues that if the culture of a company goes downhill, it can have a highly negative impact on its ultimate outcome.
According to Hsieh, the right skill set and experiences will not be exclusively responsible for the success of a company. Getting the culture right sets up a company for success.
He defines a strong culture as a group of employees who want to hang out together once they've completed their work and leave the office. One this type of dynamic exists, the rest of things like innovation, creativity and productivity will just happen naturally.
Zappos has ten core values and they are closely rooted in business concepts but they are not exclusive to textbook theories.