In psychology, we have many approaches to base our evaluation and treatment of a patient, such as psychology of education, community psychology, social psychology, humanistic approach, cognitive-behavioural approach, neuropsychological approach, industrial-organizational approach, psychodynamic, etc. I get that some approaches don't fit with the level of target/observation (e.g. I/O psychology for a single mother at home dealing with major depression), and that each one is a tool in the toolbox for a specific need and objective, but I ask for a possible integration of similar or potentially complementary approaches (neuropsy with TCC or humanistic with ecological model of Bronfenbrenner confirmed with neuropsy, etc.). In summary, I am curious of what has been proposed to build a sort of unity with some of the approaches in modern psychology.