Neo-Malthusian theory is a modern adaptation of Thomas Malthus' original ideas about population growth and its potential negative impacts on resources. It emphasizes that unchecked population growth can lead to resource depletion, environmental degradation, and social issues, advocating for measures such as family planning and sustainable development to manage these concerns. This theory connects closely to discussions about resource distribution and development strategies, stressing the importance of controlling population growth to achieve sustainable progress.