Psychological safety is 10% job security and 90% how comfortable you feel with the people you work with. Simple to understand, hard to make happen - you need to hire well.
The five dysfunctions of a team have been the hardest things to change in my opinion once habits form that prevent them.
I ponder at times if this is truly why "hyper growth" startups tend to hire on average much younger candidates and our industry says that ageism is rampant.
I can work with a junior team member growing into a role but I can’t jeopardize the entire team dynamic based on one person’s inability to work well with others, regardless of how proficient they might be.
90% of office conflicts I've encountered is between two individuals of these types.