What do you consider to be the defining barrier between Left and Right?

I’m asking various left groups and right groups, this is the first one lol. What do you think the defining characteristics are of Left vs Right?

Personally, I see Left as Collectivist Economics (50%< ownership of production or Socialised Public Services) and Right as Individualist Economics (Privatisation and Individual control over land and productive property).

Everything else is outside of ‘left v right’ in my opinion. there are anti-authoritarian leftists, anti-authoritarian rightists (to a certain extent, most of them definitely arent), and more