You lead a team made up of people from several different countries. They are all very well qualified and experts in thei

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You lead a team made up of people from several different countries. They are all very well qualified and experts in their fields. However, they have trouble working together. They constantly argue over work processes and their arguments are getting increasingly personal. They blame their different personalities, but you think culture has something to with the problems.
As a leader, how would you proceed? What steps would you take? Would you involve all of the members of the team in the solution? If so, how and why?