In the early stage of secular transition, generations differ chiefly in their religious participation. In the medium stage of secular transition, generations differ in their religious participation, importance, and belonging. - AGE GROUP DIFFERENCESIn the least religious countries today, the main difference between age groups is that younger adults are less likely to identify with any religion. Attendance at religious services and self-assessments of the importance of religion are low among people of all ages. This secular transition isn't completely uniform, and it may not be inevitable everywhere.