at the first sight of the topic, it seems like making the team member participating in the decision is a prime aspect of the leadership.however, afterconsidering the effection of leadership and the relation bewteen number and effection. i disagree with the topic.to begin with, effective leading means making a decision rightly, without hesitate,especially in the once-in-life opportunity, allocate the work to member, control the risks and costs, having plan B.the growing number of individuals envovling the decision cannot guranteen a effective decision. a convincing example is the closed government in the USA.the controdiction between Congress and Senate lead to various departments in the USA keeping closed  as long as half month and thousands of works are delayed and postponed, which raises big trouble to the public.on the contrast, a small leading group can make sophicated plans especially during the war-time.in the anti-Japnaese war, the number of captain in China is limited within a hundred but the soilder conducting the undertaking is over millions. at last, the great and justice Chinese people won under the conduction of these captain.secondly, the negative aspect of making decision have to be taken into account. more individulas making the decision, more time will be spend. time is money and chance. what is more, more people, more ideals.there is no decision can satisfy every member. just take the example of my class. the president of my class wants to hold a barbeque at the weekend and asks opinions of the locations. the whole class discussed it for several hours, someone says the central park is clean and someone is aganist for high prices, the rest class go nowhere other than the central park.several hours rang no fruits.at last, what the member cares about is the profits and payoffs. if the decision of leader made brings high salary, most member, i believe will stick to it tightly.