The world is constantly changing and changing, various chapters of world history bring a series of new inventions, subsequent results and difficulties. From the machine era of the 1800s to the postwar era, it is now the information era, and each chapter has created a series of new challenges that need to be overcome. For example, several technological advances have affected the whole country, including the latest technology development including mobile phones and the Internet breaking communication barriers.
Social and Political Changes Families, communities, and countries often develop benefits to other members and develop in ways that are not good for other members. Society has created various mechanisms such as elections, courts, mediation, etc. to promote change and eliminate fraud. However, there is a limit to this mechanism. For example, the courts need education and funds to guarantee a fair hearing. Violence is often interpreted as the only option for individuals and groups who do not see nonviolent ways to get rid of disadvantages.
Every method of research has its own strengths and weaknesses. The method of case studies is flexible and can provide a rational and complete understanding of complex situations and their changes over time; for example, progress of landmine control plans as decision makers, success and failure of planning, and Response to changes in wider environmental economy, society, etc. In the formal definition, the main disadvantage of the case study method is that the obtained evidence does not effectively draw conclusions that can be generalized, This applies to cases or cases. (Mostly because the case is not randomly chosen, it is not possible to evaluate the statistical validity of the survey results.)