Recent decades have witnessed recurring crises within, and criticism from o
utside, the Euro-Meso-North-American scientific psychological tradition. Th
e problems are traceable to the lack of cultural and ecosystemic sensitivit
y on the one hand, and an attempt to indiscriminately generalise findings a
cross behavioural settings, on the other. Based on the construction of a ne
w science, which integrates the behavioural and cultural models, answers ar
e offered to the question of what constitutes universal and Idiosyncratic h
uman attributes and social behaviours. The indigenisation of psychology in
general and Mexican ethnopsychology in particular are offered as examples o
f solutions to the stagnation of the ethnocentrically based mainstream.