Too many executives I've met over the years have the mentality of a bodybuilder; they've come to accept the idea that growth is synonymous with success.
Members of trusting teams accept questions and input about their areas or responsibility, appreciate and tap into one another's skills and experiences, and look forward to meetings and other opportunities to work as a group.
The impact of organizational health goes far beyond the walls of a company, extending to customers and vendors, even to spouses and children. It sends people to work in the morning with clarity, hope, and anticipation and brings them home at night with a greater sense of accomplishment, contribution, and self-esteem. The impact of this is as important as it is impossible to measure.
The team you belong to must come ahead of the team you lead: this is putting team results (e.g., organizational needs) ahead of individual agendas (e.g., the team or division you lead, your ego, your need for recognition, your career development, etc.) Confidentiality is respected downward more than it is respected upward. Organizational alignment is a direct result of this hierarchy (if it were the other way around, organizational alignment would be very difficult to achieve).
Achieving vulnerability-based trust (where team members have overcome their need for invulnerability) is difficult because in the course of career advancement and education, most successful people learn to be competitive with their peers, and protective of their reputations. It is a challenge for them to turn those instincts off for the good of the team, but that is exactly what is required.
Teamwork remains a sustainable competitive advantage that has been largely untapped because it is hard to measure (teamwork impacts the outcome of an organization in such comprehensive and invasive ways that it's virtually impossible to isolate it as a single variable) and because it is extremely hard to achieve (it requires levels of courage and discipline that few executives possess) - ironically, building a strong team is very simple (it doesn't require masterful insights or tactics).