From time to time, nations are confronted with disruptive events that have the potential of adversely impacting a large population. In such instances, different actors such as individuals, corporates and governments drive changes based on their own survival instincts. While a few of those changes are temporary and reverse after the event, some changes are more permanent. The recent pandemic is one such shock because of which we are experiencing similar disruptions but are unsure about the transitory nature of each of these changes. We study three of such major events from the past namely Spanish Flu, oil shock and 9/11 terrorist attack in the USA to identify the factors that influence permanence of change.