Speaking for Hollywood... maybe
It was the peak before the concept of Blockbusters and Action-Packed Heat kicked in (80's Hollywood lack big dogs regarding cinema "like it used to be")
But the 60's and 50's were also very good
Overall i think, my opinion at least, 70's was the best for US
It varies in other countries, the "golden ages" or so to speak:
South Korea is the 00's
Italy and France have the 60's
Mexico has the late 40's/ early 50's
Japan late 50's / early 60's
Argentina dare i say the 00's too
Thing is some of those went on to have more good years later on (or had them earlier) some others have their first taste of a good industry