When a group of people starts a company, the founders usually serve as sources both of funding and of skills in marketing, management, and technical matters  It is unlikely that a single individual can both provide adequate funding and be skilled in marketing, management, and technical matters
Ttherefore, companies founded by groups are more likely to succeed than companies founded by individuals
New companies are more likely to succeed when their founders can provide adequate funding and skills in marketing, management, and technical abilities than if they must secure funding or skills from nonfounders.