Conflicts and frictions among people of different ages are not new phenomena. The older generations have always been nostalgically reminiscing "the way things used to be done in their youth", while the younger generations perpetually argue that they are misunderstood, ignored, or even scorned. Today, though, it is the first time that four generations (namely, Baby Boomers, Gen-X, Millennials, and Gen-Z), distinct in their mentality and behavioral patterns, co-exist in the working environment, each one playing, directly or indirectly, a decisive role in the determination of corporate vision, strategy, organizational culture, human talent management, allocation of resources, and marketing planning.