The psychological development of human beings is possibly one of the most exciting and complex research areas. Both the individuality and the dynamics of psychological development require sophisticated research strategies. This way, the fine line between generalizing and scientific knowledge and the “ethos of difference” can be explored. Due to recent advancements in Epigenetics, developmental psychology is poised to evolve significantly across the lifespan, necessitating a closer examination of the intergenerational effects on individuals. This requires the use of innovative research methodologies and meta-analytical discussions centered around the scientific theory.