Identify the two big breaks in the demographic transition and their causes

There is a demographic transition theory to understand the multiple population changes worldwide, that outlines changes in mortality, fertility and growth rates according to each stage or shifts in the population over time.

There are four stages in the demographic transition model:

Stage 1: Pre-transition; Stage 2: Early transition; Stage 3: Late transition; Stage 4: Post-transition;

and during the 2 & 3 transition stages, one can identify two big breaks:

The 1st big break is the sudden drop in the death rate, which is caused by technological innovation; for example, the development of X-rays, Penicillin, and Insecticides. And the 2nd big break is the sudden drop in the birth rate, caused by an improvement in education, and the change in social customs, for example, when people decide to have fewer children by themselves .

Where are the subjestions

question 1

the reasons for the global discontent in the early 1900s were the following:

desire for independence   was the main fight of many territories which were still under the control of colonial powers. dissatisfaction with peace terms of wwi . the best example is the case of germany, that was forced by the peace treaties to pay very expensive war reparations to the winners of wwi. some time later, german leaders broke relations and stopped recognizing the authority of those who imposed sanctions on their country, counting with the support of the population that was suffering the important economic consequences of the payment of reparations. overproduction of consumer goods which led to hyperinflation scenarios and very week currencies and economies.

question 2

the reasons for the great depression were the following, and these led to wall street crash in october 1929 and caused the subsequent great recession period.

high personal debt, that ended up with many bankrupt investors. falling stock price as everybody was getting rid of the stocks, many because they could not meet the amounts of money required by the margins that backed their investments.

question 3

italy: led by the fascists and benito mussolini   and promised to restore the greatness of the roman empire. germany: led by adolph hitler and the nazi party and conducted anti-jewish riots in austriajapan: was controlled by aggressive military leaders and invaded countries for their resources

2.