Manual de Sociología: la sociedad gaseosa

This manual (handbook), entitled The Gaseous Society, proposes an evolution of the concept of liquid modernity toward a state of greater volatility and evaporation of social structures, driven primarily by the Fourth Industrial Revolution and the technological impact of recent decades. Throughout its chapters, the work integrates the classical foundations of the discipline, reviewing the theories of key figures such as Marx, Weber, and Durkheim, and applying them to the analysis of contemporary dynamics of power, order, and conflict. The text does not limit itself to theoretical exposition but delves into social research methodology, detailing both quantitative and qualitative techniques that allow for a scientific approach to the study of reality. A central focus of the book is the detailed examination of social structure in Spain, analyzing the period from the end of the twentieth century to the present, with particular emphasis on the generational gap, job insecurity, and the difficulty of accessing housing for young people compared to the stability of older demographic groups. The manual also explores diverse specialties such as the sociology of communication in the age of algorithms, criminology, education, and gender, offering a comprehensive view of how globalization and digitalization are reshaping the identity and cohesion of communities. Finally, the work reflects on the challenges of practicing sociology in an environment of misinformation and rapid change, arguing for the necessity of a critical and rigorous perspective to understand the tensions of a world that seems to be moving toward constant and unpredictable transformation.