This book aims to present how to build a world of peace, progress and happiness for all humanity, making all planetary utopias a reality. Realizing planetary utopias means making world peace prevail over wars, full democracy over dictatorships in the world, civilization over barbarism in the world, democratic socialism replaces decadent capitalism, the Welfare State eliminates inequalities in the world, there is the rational use of natural resources in the world to avoid their continued devastation, economic and social chaos at national and global levels is eliminated with the adoption of economic planning in each country and worldwide, there is the construction of cities green and intelligent in all countries of the world to avoid the continuity of socially and environmentally degraded cities, science and technology are used exclusively for the good of humanity, there is the achievement of the immortality of human beings to counter the inevitability of death, there is the achievement of humanity''s survival in the face of threats to its extinction internal and external to planet Earth and, finally, the achievement of happiness for human beings, individually and collectively, which will occur if humanity realizes all utopias.