People with secure attachment styles worry less and view the world as a safe place; while the insecurely attached are hyperaware of the slightest problems because they're either never alone or are entirely self-reliant. A study published in Perspectives on Psychological Science found the best group to handle a crisis situation is a mix of secure and insecure individuals. The worst? All securely attached people. "Secure people have disadvantages," said experimental psychologist Tsachi Ein-Dor of the New School of Psychology in Israel. "They react slowly and then act slowly because they need to first get organized."
So while the insecurely attached's relationships might not last, if trouble comes, their lives will.