Crisis Intervention There have been a number of major events in the last 30 years that have impacted the development of crisis intervention. Choose one event from the past 30 years and explain how crisis intervention has developed and changed due this event in a 7 to 8 page paper. Referencce page. Be sure to: Describe at least 4 stages in the development of crisis intervention (either pre- or post the event of your choosing). Provide detail and examples that illustrates each stage and its purpose. Illustrate at least 4 ways that crisis intervention has impacted society. Be sure to explain the impact using real world examples.