There are theoretical problems with defining secularisation, including how religion is defined in the first place
exclusivist definitions portrays religion as involving beliefs in the supernatural or omnipotent forces
inclusivist definitions focus on a wide range of beliefs and activities, including conventional religion, to which people give a 'sacred' quality.
inclusivist definition of religion encapsulate New Age therapies and inner-directed spirituality, as well as civil religions like football, clubbing or keeping up with the lives of celebrities, activities that harbour sacred qualities to some people
this means that it is difficult to pinpoint the exact point at which religion declines in society, the alternative activities which replace religion will overtime be defined as religious
