This e-book explores the evolution of the concept of work through the ages, from the early hunters to the modern era, highlighting how employees' needs have transformed significantly. As material and technological progress flourished, new human needs emerged, especially in areas like mental health and work-life balance. The book addresses the importance of "happiness and loyalty in the workplace" across five main pillars: job satisfaction, financial stability, mental health, physical health, and social relationships. It also presents recent studies showing the positive impact of a supportive work environment on employee productivity and satisfaction, offering practical solutions to meet employee expectations in modern workplaces.