conventional wisdom; commonly accepted idea
Refers to a belief or notion widely held in society, often without questioning its validity.
Conventional wisdom holds that early rising is good for your health.
His opinion goes against conventional wisdom.
常識 is 'common sense' or basic knowledge everyone is expected to have, while 世間一般の通念 is more about widely held beliefs or ideas that may not be objectively true.
A compound of 世間 (society, the world), 一般 (general, common), and 通念 (commonly held idea). The phrase as a whole is a fixed expression meaning 'conventional wisdom'.