What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?

2 answers

Ideologies often involved ingrained habits. But ideologies do disappear in time.

Think of the feudal system, anti-Semitism, communism, apartheid, and racial discrimination.
In what types of activities do neighborhood organizations get involved?