Lencioni believe that these five "feed on each other" in destroying the success of the group.
Lencioni emphasized the negative effects of the absence of trust in a team. Without this, any member of a team will not harmoniously work with each other. This breeds another dysfunction: fear of airing of constructive and genuine opinions to his group members. In a team with closed communication lines, team members rarely commit to clear and agreed upon decisions. Without lucid commitment to a clear plan of action, hesitation of each member to be accountable to his action will most likely follow. Whenever accountability is not held by members of a team, results of the team will be unnoticed. Inattention to results will consequentially create an environment wherein team members put their individual needs above that of those of the group. As we can see the existence of one creates a chain reaction that often results the emergence of the rest.
What engenders the greatest impact on me upon reading Lencioni's solutions to these five dysfunctions masterpiece is the author's solutions or countermeasures to the first dysfunction, the lack or absence of trust.
He first stressed the importance of having a competent leader in a group. He will instigate discipline and persistence that the rest of his team members need. He should initiate the solutions posed by Lencioni.