After world war ii, many countries believed in the principle of collective security, which means that

After World War II, many countries believed in the principle of collective security, which means that nations should act together to promote peace.

Explanation:

Collective security is based on states giving part of their security policy sovereignty to an international authority. Peace must be ensured by the states acting jointly instead of individually and solely for self-interest.  Supporters of idealism will often believe that collective security is the most optimal security system in terms of maintaining world peace. The UN is an example of such a collective security organization.

The certainty is that any international war risks are reduced if the system otherwise works. However, such collective security systems have never worked 100% as intended. One of the biggest problems is that major powers in particular are unwilling to surrender their full sovereignty over military means. This includes the reason why the UN has a Security Council, where five of the world's great powers have the right to veto military decisions.

the hollywood film industry of 1950 was threatened on several different fronts. television broadcasting was rapidly becoming the dominant entertainment medium in the united states. the paramount anti-trust consent decree requiring separate ownership for production companies and theater chains had gone into effect on 1 january 1950. large numbers of young men and women were marrying, having children, and moving to the suburbs, which affected the viability of downtown first-run movie theaters. foreign revenues were endangered by protectionist tactics including quota systems, high taxes, and blocked funds. finally, the morality and patriotism of hollywood films and filmmakers were under attack from government, religious, and citizens' groups.

explanation:

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