This page shows you the list charts. By default, the movies are ordered by how many times they have been marked as a favorite. However, you can also sort by other information, such as the total number of times it has been marked as a dislike.
The 1970s were a decade in the last century. A lot of stuff happened then. There were wars, elections, uprisings, crises and scandals. People were born and died. Sport matches were won and lost. Things were invented. Trends came and went. This is the complete list of the favorite movies made during that decade according to the voters on the iCM forum.
Top 250: https://www.icheckmovies.com/lists/icm+forums+favourite+movies+of+the+1970s+top+250/lonewolf2003/
This is a list of the 10 most voted movies from each year in the 1970's on IMDb. It gives another perspective than the traditional lists of highest rating. It's more like a popularity contest than a quality contest.