Methodology 30 countries questioned across 5 continents, a representative sample of 2/3 o f t h e w o r l d' s p o p u l' a t i o n... a representative sample of 2/3 o f t h e w o r l d' s p o p u l' a t i o n... or 1000 individuals questioned i n e a c h c' o u n t r y... gender; age, region, profession o r s' o c' i a l c' a t e g o r y, agglomeration size. Data collection method.