The instability of the security environment is dangerous and can become devastating for a state, a region, a continent or even for the whole world if the necessary measures are not taken immediately. The main issues that have, over time, underpinned the European project were security and social welfare. These aspects are still important today and are very topical, representing at the same time the main objectives of the European Union, even if the changes are fast, and the security environment we live in is particularly fragile. For over half a century, the European Union has continuously contributed to maintaining peace, stability and prosperity, raised the standards of living, launched a single currency and has constantly evolved to create a single market in which people, goods, services and the capital can move freely, as if it were in the territory of a single country. Now, the European Union must face the existing challenges and adapt to the changes in the security environment. The adaptation to the new, to the changes, is the fundamental property of the European Union, and this must change and at the same time adapt the mode of action in relation to the alternatives that have occurred both from a quantitative and qualitative point of view.At present, the adaptability of the European Union in the new global security context is precisely its ability to understand the changes and make the necessary adjustments immediately to the current requirements, to react promptly with appropriate responses that will lead to the restoration of the status quo.