C.P. Blacker' demographic transition model

There many demographer and have difference perspective on transition stages. C.P. Blacker has presented five stages of transition phase. These are as follow:

1. High stationary population: This stage is similar to Thomson and Notestein's high potential growth. In a very underdeveloped economy and traditional social system, the difference in the birth and death rates is negligible and therefore the population is almost stationary with irregular fluctuations. Famine and epidemic regularly take heavy tolls on life. He said that 22 percent of world population was at this stage till 1930.
2. Early expansion stage: fulfillment of food supply brought by higher yields in agriculture and better transportation prevent death due to starvation. Frequent famine and epidemic were under some control, medical facilities were extended to common man, preventive medicines put some check on infections diseases, death rate started to fall slowly but birth rate however continues to stay almost at the biological limit. As a result, the population starts to growth. C.P. estimated that 40 percent of world population was at this stage in 1930.

Optimistic view of population

According to follower of these view the inter-dependent of population growth and resources take positive relation and different problem of human society can be solved by using science and technology. Human are not only weight for earth without skill and technology but also can increase capacity and productivity of available sources by using their own knowledge, forethought and skill. People can fulfill their need using multidimensional environmental resources. They believe science and technology is involuntary sources not alternative of natural sources and human society has got many facilities in difference way from science and technological sources. So, it is also called technological optimists thought. Supporter of technological development, believe that human able to solve any problem that is created by human activities. Geologist Martin Lewis expresses his thought on world as one of abundance and opportunity. Follower of these view focuses on only human’ wining on natural resources and pleasure by taking positive development of science and technology’ good events. Progress of technology blindly believe on bringing happiness and prosperous to human society and they do not measure environmental crisis that brings common and publicly from science and technology.

Optimistic view of population

According to follower of these view the inter-dependent of population growth and resources take positive relation and different problem of human society can be solved by using science and technology. Human are not only weight for earth without skill and technology but also can increase capacity and productivity of available sources by using their own knowledge, forethought and skill. People can fulfill their need using multidimensional environmental resources. They believe science and technology is involuntary sources not alternative of natural sources and human society has got many facilities in difference way from science and technological sources. So, it is also called technological optimists thought. Supporter of technological development, believe that human able to solve any problem that is created by human activities. Geologist Martin Lewis expresses his thought on world as one of abundance and opportunity. Follower of these view focuses on only human’ wining on natural resources and pleasure by taking positive development of science and technology’ good events. Progress of technology blindly believe on bringing happiness and prosperous to human society and they do not measure environmental crisis that brings common and publicly from science and technology.

Under Population Region

The term under population refers the less population, weak manpower and weak technology for extreme use of natural resources and services where available natural resources is strong than human manpower. There are more possibilities to increase the life standard and prosperity of community by using adequate available natural resources. But there is no acceptable manpower as natural resources. So there natural resources and services is getting loss without any reason.  Southern world’ evergreen forest of Brazil, Amazon, Congo lays such region. Such world region where could not bring utilization of resources and experience lack of required population for complete utilize of sources. There is found, these types of region distribute and using their own sources from combination, business and support system of over population region. But, there may increase external interference and exploitation so rapidly degrading the natural resources there can be found many result from deforestation and vicious cycle of poverty in Africa and southern America’ countries. Whereas developed countries using their technology for their benefit. There has more or less utility condition of natural resources by the cause of uses of polar region of earth, oceanic region and space for residence because of materialized civilization and human selfish nature.

Over Population Region

The term over population refers the imbalance condition of population and environmental resources where Population is more than environmental resources and services. It is fact that, human need clean and adequate natural resources and service for live. But there is inequality distribution system of population in the world. Somewhere extremely over population has been concentration and uses of resources steps the threshold. Changing population has brought great challenge and decline the life standard.

Pessimistic view of population

Supporter of this view believes environment crisis is brought by growing human’ wasteful uses and highly exploitation of natural resources while fulfilling their need. Many people fight and struggle for few resources to get lower service and need in their life when the world reaches in critical stage because population growth rate increase in geometrical ratio and food in arithmetical ratio. Food is

Balance population and Resources

It has long relation between human and environment. Our living natural and social environment is directly impact by development of technology and progress of science of human activities. So, present pattern of world development, social value, economical system and dynamic demography is moving on from inter-dependent of environment and human population. There are different views about changing sequence occurring on earth by adding mode of social economical development and interrelation between uses of resources, distribution character and changing size of population.