Ona Radtke has developed a theory of population growth based not only on academic research, but also on travel through over 65 countries, observing the many different lifestyles th...ver másOna Radtke has developed a theory of population growth based not only on academic research, but also on travel through over 65 countries, observing the many different lifestyles they feature. He spent his final twenty years in his adopted home, Guatemala. Having passed away shortly before manuscript completion in October of 2009, his work appears posthumously.ver menos