Why is Christianity more successful than Taoism?

A:

Christianity is a proselytising religion, whereas Taoism (or Daoism) is not. Christian missionaries have spread out across the world seeking converts and, when sufficiently dominant, Christian religious leaders actively suppress other religions. On the other hand, Taoism has, through most of the period it has coexisted with Buddhism and Confucianism, been content to coexist. Christianity has been marketed aggressively in China for centuries, with the result that perhaps five per cent of the population is now Christian, whereas Taoism has not actively sought converts outside China and would be considered unsuccessful if success is measured by conversions.

Both religions could be considered as successful according to their own standards. Christians measure success by the achievement of conversions, and in this Christianity is successful. Taoism measures its success more by the spiritual fulfilment of its followers.