"general discourses" is grammatically correct and can be used in written English.
It is most commonly used to refer to broad and universal discussions or conversations about a topic. Example: The conference covered a wide range of general discourses on education, including the latest research and best practices.
The argument soon becomes elevated into a general discourse on religious and philosophical matters.
There was a need for such terms back then, because their crackpot counterparts held much greater sway in general discourse.
In his Rose Garden speech Obama did use the phrase "acts of terror", but he did so in the plural and within a general discourse on the threats facing the US rather than as a specific reference to Benghazi.
I tuned in throughout the day, and while I enjoyed the arguments, a lack of technical people in the general discourse was disappointing.
In the general discourse on the economic valuation of ecosystem functions, it was suggested to valuate ecosystem functions via the ecosystem services they provide.
The conflicts over "fracking" are sometimes related to a general discourse on the increased demand for public participation and transparency in political and economic issues.
Biodiversity has not only become one of the basic environmental policy objectives in both international and national political arenas but also an elementary part of the general discourse of global environmental change.
Bearing this in mind, it follows that education has a prominent role to play in the construction of systems of power; privilege and oppression; and the general discourse of our social realities.
In this article I suggest that this visibility/invisibility paradox (Mirza 2009) can be interpreted not only as a reflection of the number of racialised researchers in Swedish higher education, but also as a general discourse of colour-blindness and Swedish white privilege.
