Groups, however, don't always make good decisions. Juries sometimes render verdicts that run counter to the evidence presented. Community groups take radical stances on issues before thinking through all the ramifications. More people means more information. Decision making can be effortful, and complex.
More people means that areas of expertise can be exploited.
Also, you can make more monumental decisions in groups, because you know you won't be singled out for blame. Can hide, basically, from personal responsibilility. Not all groups make good decisions. However, groups, however, don't always make good decisions. Juries sometimes render verdicts that run counter to the evidence presented.