In current period, in a group, doers ( the people who follow the team thought) make ideas become real productions ,the key to success. Commonly, if a group only has many thoughts or advanced concepts, still, it is impossible for such groups to be successful.Because the scale to success for group work depends on what they have done rather than what they have thought. In addition, the order decided by leaders are usually carefully measured according to the marketing trends or industrial developing tendency, so the orders themselves are of no doubts. For a company, the hight efficient working is the inevitable, which probably can bring them more profits.Thus, the doers play a really principal role in a group.
In the other hand,without the a person who stay a opposite point to the group, the group are likely to be uncreative and aggressive . Not surprisingly, it is common to meet the opponents in the companies or groups. It is because one's perspective is mainly based on what they experienced and the roles in a company. as group members, they rarely have chances to have a grand view of the whole company. Even some people only cater for individual benefits. instead, the leaders in the company will firstly consider the major aspects in company, those individual demands and requirements sometimes are ignored. Moreover, if a group does not have an opponent , thoughts by the leaders may be not convincing. generally, a opponent is always an objective people who are able to consider the problems in two completely different aspects.And with this kind of people, they can argue with others and discuss in a group until find out a best way to do the project or program, and it can make whole team to find out their mistake and revise the decisions or orders and make the results to be most creative in most people's eyes.
In terms of which is better for group work, I think a group means in the team, it is possible to hear different voices, do different things, and even with various individualities. therefore, no matter who we are and what we did, only if we have the same purpose , common belief, and frequent communications to understand each other, we are in the right place and of equally important position in groups.