I doubt Zamenof knew about The Principles of Population by Thomas Malthus. In 1797 Malthus declared that misery and harsh conditions (e.g. poverty, conflict, disease, war) were necessary to avoid overpopulation and prevent the disappearance of civilization. There are three known cases of civilizations disappearing: in Guatemala, in Cambodia, and in the Easter Islands. I suspect that still undiscovered civilizations have disappeared in Brazil and Africa. These disasters were due to exhaustion of available resources as a result of overpopulation.
Birth control was developed in the 20th century, and developed countries have used it effectively. However the Third World does not have the education or resources to use birth control effectively. We need to develop and educate the Third World and empower women in order to stop rapid population growth.
Zamenhof created Esperanto to promote Homaranismo. We need to promote birth control in order to establish Homaranismo, as it cannot exist if harsh conditions are necessary to limit population growth.
I am searching for an Esperanto writer who would like to promote birth control in order to establish Homaranismo. I have been writing short papers on overpopulation since 1970 and have a wealth of information to share. It needs to be rewritten and translated into Esperanto, and I would like to have it published as a paper. If publicized, such a paper would be a great promotion for Esperanto.