What are the basic needs according to Maslow's hierarchy, and how do they relate to survival in crisis situations?

Maslow's hierarchy of needs outlines a pyramid of human motivations, starting with basic physiological needs (like food and safety) and moving up to psychological needs (like belonging and esteem). In crisis situations, such as war, the most fundamental needs for safety and survival become paramount. When these needs are threatened, individuals may resort to primal instincts, often disregarding social norms and moral considerations.