World demographic problems are strikingly increasing, and evidence based, scientifically grounded communication programs in managing these problems are common to find solutions to these problems. Current scientific research methods and communication programs and methods are considered in a vast amount of demographic projects worldwide to solve global earth problems. The day when humanity starts eating the planet, say experts at the home page of the New Economics Foundation is 9 October, 2006. New research reveals rising consumption of natural resources is pushing the world into ever earlier ecological debt, or overshoot. New calculations show that from this date we will be living beyond our global environmental means. Humanity has used up what nature can renew this year and is now eating into its ecological capital. Each year, the day that the global economy starts to operate with an ecological deficit is designated as ecological debt day known internationally as overshoot day. From now on humanity will be in ecological overshoot, building up ever greater ecological debt by consuming resources beyond the level that the planet's ecosystems can replace, and this has been called the biggest issue you have ever heard of. Part of the above processes is unsustainable demographic processes of global population. This is a serious risk for sustainability of human and earth ecosystems. Population growth, changing birth control, problems of migration, nuptiality, poverty, health crisis, ageing, mortality and various forms of inequality in these demographic processes are serious challenges to the human population as well as to the earth ecosystems. Managing these demographic processes is crucial from the point of sustainability. To make demographic processes sustainable scientific research and communication should be put in a new way and be used more effectively. To influence current demographic processes research and communication must be made effectively as it has already made by the POPLINE Staff of the INFO Project at the Johns Hopkins Bloomberg School of Public Health/Center for Communication Programs and is funded primarily by the United States Agency for International Development. It is estimated that the world human population increase by about 200 thousand people daily. Uncontrolled population growth may lead to overpopulation. Conversely, a declining population may lead to an ageing society where the needs of the elderly are being cared for by a smaller group of working age people. Problems of overpopulation, increases in births and 3 life expectancy, ageing societies and unsustainable use and depletion of resources are common problems of the world. Communication programs may effectively help in solving a series of demographic problems. These programs are related to ICT and adult education. New scientific research methods including multivariate and computer-intensive statistical techniques are indispensable part of developing social communication programs to alleviate increasing demographic problems. Andrew Simms, NEF's policy director says: "By living so far beyond our environmental means, and running up ecological debts we make two mistakes. First, we deny millions globally who already lack access to sufficient land, food and clean water the chance to meet their needs. Secondly, we put the planet's life support mechanisms in peril." Earth ecosystem crisis and critical demographic processes cry for evidence-based risk management and proper risk communication supported by research-based feedback to slow down or stop critical processes. The book provides an effective approach to all these problems listed above by the author himself. The reader after reading the book should acquire sound knowledge of the world's most complex problem, World Demographics.