Steve Bruce’s and Karel Dobbelaere’s secularisation theses – that industrialisation, urbanisation, societalisation, and rationalisation erode religion on macro-, meso- and micro-levels – can be challenged by reference to the growth and vitality of Christianity in China and South Korea. Christianity propelled economic growth and political change in South Korea at the end of the twentieth century, and has recognised potential in China. Religious institutions play critical roles in contemporary South Korean and Chinese communities. Although in an economically dynamic age permeated by scientific thinking, Christianity thrives in the private sphere in China. The plateauing of the growth rate of South Korean Christianity in recent decades coincides with widespread stability and prosperity in the country, which may have reduced the psychological and practical needs for religion. Thus, the Secularisation Thesis ought to be recast: social stability and prosperity better explain religious decline than industrialisation, urbanisation, societalisation, and rationalisation.