1) ¿Qué sucedió con las democracias liberales europeas después de la Primera Guerra Mundial que impulsó la aparición de nuevas alternativas ideológicas?

After the First World War, humanitarian crises began to appear in those countries where they did not present democratic policies, policies where the respect, right and value of people were based.

That is why humanity began to enter into great social conflicts in those countries where democracy had been broken or destroyed after the war.

World War I was the first massive scale war conflict known to mankind. The balance was truly terrifying, and left Europe in a thousand difficulties

From a human point of view, the Great War, as it was then known, left a death toll of 7 million civilians and 10 million soldiers during the attacks, only during the attacks. Besides, the impact of the deaths is considered. hints produced by famines decreasing the right to life, by the spread of diseases decreasing the right to life and by disabling accidents caused during the attacks, which generated problems such as disability, deafness or blindness (which as a consequence brought difficulties of social insertion, that is why they were also discriminated against or not supported labor in non-democratic countries)

Explanation:

The consequences of the First World War were not only economic or material, which is what was most used or used to speak at that time. New ideological discourses would appear on the scene, and they began to emerge in a huge way, having a great influence on society.

To the extreme left, the expansion of communism, which had risen to power for the first time with the Russian Revolution of 1917, since its theoretical formulation in 1848.

To the extreme right, the birth of national-socialism (Nazism) in Germany and fascism in Italy, with their respective sources of irradiation.

These two positions opened a world crack in terms of social thoughts, and this led to fanaticism in some cases where democracy was left aside.

the answer wold be b) travel among nations should be regulated by an international organization