Should the so-called 'First World' assume it can dictate policy to the so-called 'Third World'?

It depends, if they are receiving billions of aid then there can be conditions which could be placed on it.
But in day to day things? Its their country and can do as they like.

Yes no country should be able to dictate policy to another.
They can however offer advice and maybe assistance.

Perhaps if we stopped putting labels on everything change could begin.

I don't know who the first world is to be honest🤔