What are the best methods of pissing off other civilisations?
I know going to war against them is probably one of the most effective ways of damaging your relationship with other civs, but I was also looking for none lethal methods too.
Denouncing them, asking them to stop settling cities near you and asking them to stop spying on you all seems to upset them, but by how much? And which is the most effective (or damaging, depending on your point of view)?
Is there anything else I can do, short of declaring war, to upset and provoke other civilizations?
I am hoping to upset all the civilizations so much, that they all join forces and declare war against me. I am guessing this might be difficult to achieve, especially as some civilizations will respond to your action in different ways, but anything that gets me close to this goal would be great.