In the second edition of his Essay on the Principle of Population, Malthus included twelve chapters that offer a remarkable description of population dynamics from all corners of the world. His discussion of (sub-Saharan) Africa was almost entirely based on the travel accounts of James Bruce and Mungo Park, two late eighteenth century British explorers. In this essay, I introduce these sources ...

In a pilot study a prototype Malthus 128H microbiological growth analyser was used to study the growth of six commonly encountered urinary pathogens in a range of five different laboratory media. No single medium had been able to show acceptable conductance changes for all bacteria within five hours. Subsequently, the Malthus system, with fastidious anaerobe broth as the culture medium, was use...

The paper by Weerasinghe and Parr resurrects a longstanding debate over the causal role of wealth in fertility reductions of the past centuries (1). Malthus, who did not foresee any negative correlation between wealth and fertility, wrote, “That population does invariably increase where there are the means of subsistence, the history of every people that have ever existed will abundantly prove”...

Darwin’s theory of natural selection is a mixture of Lyell’s theory and Malthus’s theory and Darwin used wrong Lamarck’s theory, theme of sociologist Herbert Spencer ‘survival of the fittest’ plus believes as the mechanism of evolution. Evidences are provided form his paper 1858, ‘Origin of Species’ and ‘Descent of Man’ his autobiography and different text books. Diverse literatures showed that...

A new study has shown that maximum overfishing of coral reefs occurs among countries at intermediate levels of socio-economic development; can managers and policy makers help countries dependent on these ecosystems avoid the resulting poverty traps?

"A unified growth theory is developed that accounts for the roughly constant living standards displayed by world economies prior to 1800 as well as the growing living standards exhibited by modern industrial economies. Our theory also explains the industrial revolution, which is the transition from an era when per capita incomes are stagnant to one with sustained growth.... [The authors] use a ...