it's demonstrably incorrect to say the mainstream media were the SOLE reason for the resurgence of astrology in the 20th century.
Please demonstrate!
What other factor, aside from the inclusion of horoscopes in penny newspapers as a means to boost circulation, can you give for the rise of horoscopes in the 20th Century?
Is your demonstrable phenomenon the same moving force behind the huge interest in sudoko puzzles in the UK as well? And crosswords?