Contingency theory proposes that there is no single best way to organize or lead an organization, and that the optimal approach depends on internal and external situational factors. Key points of contingency theory include: 1) different leadership styles are appropriate for different situations; 2) organizations perform best when their structure fits both the environment and the needs of its members; and 3) managers must analyze each unique situation to determine the most effective approach. Contingency theory rejects the notion that universal management principles can be applied in all cases.