Time line 1970's:

Social Issues:
Many social issues that have faced a change, this change has continued from the 60's.
The earthquake that happened in Peru, which killed 50,000 people.

Political Issues:
The US troops invaded Cambodia (Vientnam War)
Tonga and Figi gained independence from Britain.
India and the USSR signed the 20 years pact.
Britain takes over Northern Ireland.
India becomes known as the world's sixth power for having the nuclear power.

Economic Issues:
Seen as the worst economic decade for European and American economy.
Third world countries continued to progress.

Media Issues:
The God Father (1972)- the number one gangster film ever made.
Star Wars.
The first time the steadicam was used in Rocky.