The phrase "mainstream ideologies" is correct and usable in written English.
It refers to the dominant or widely accepted beliefs and values in society. You can use it in a variety of contexts, such as discussing political or social viewpoints, cultural norms, or popular opinions. Example: "The media often reinforces mainstream ideologies, perpetuating a narrow and homogenous view of the world."
Instead, films and TV shows "must be dominated by mainstream ideologies and 'positive energy'".
By the end of the 1960s, the New Left had splintered into factions, partly under the pressure of events and partly because of its failure to replace more mainstream ideologies.
Blacks can seem less threatening to whites through how they dress, their manner of speech, their nonverbal behavior, having mixed racial ancestry or even adopting more mainstream ideologies.
And possibly (c): suppression of those women, minority racial groups, the poor, and so on whose interests are not adequately recognized and protected by the dominant, mainstream ideologies to which these elite judges have an affinity.
Police enforce the law, but also mainstream ideologies.
Take special note that all "mainstream" ideologies in the world today (American conservatives, American liberals, and social democracy), are all on the individualist end of the spectrum.
And religious Zionism became the mainstream ideology for observant Israeli or "national-religious"—Jews.They had willing allies.
What was once a Conservative rallying cry grew into a mainstream ideology that has cut across party lines.
This injury is designed to provoke the audience into rebelling – against judy, against mainstream ideology, against American politics, but most of all against themselves.
Multidimensional sustainability has become the mainstream ideology in decision-making over previously favored resource-centered approaches (Tuomasjukka et al. 2013a).
The Scottish National Party (SNP)—unlike many nationalist groups, including its far-right British counterpart, the BNP has a mostly leftist, though still fairly mainstream, ideology.
