In my experience in both the work place and the military, there are few projects that require group participation where all voices are considered equal. With different leadership styles learners may assume command of the group or attempt to. One learner may try to take charge in a Democratic leadership style and others will assume an autocratic style. Other learners will take a group project as an opportunity to skip out on work forcing the others to pick up the slack. The lacking work will bring the group grade down. How is that fair to the other students? In a learning environment each student is responsible for their own education and actions. As for diversity, I feel that no matter how diverse a group is you will not always have full participation due to leadership styles or students taking advantage of the multiple worker situation. On the opposite side of the coin working with groups is an important aspect in life. groups help communication skills, networking and brainstorming. I think a good compromise is to allow group activities in moderation but instead of grading the group, grade the individual.