Buddha described four aspects and stages to love. There is first love of self, then love for others, then love for the joy of others and finally love for all things in equanimity. This loving compassion can be understood through intimate relationships as well as the macrocosmic dynamics between nations.
The first stage, the love for self, and each following stage is a requirement before being able to ascend to the other levels of love. The love of self can actually be noted in the behavior of others. When they have love for self they automatically have love for others. People who have hatred towards others have innate, unaccepted and even unknown hate for themselves. When you have love for self you recognize that all people are very much like you, you now, or you at one time or another. We are all much more similar than different. Discrimination and prejudice is an example of not having love for self because, simply, you are what you hate. Just as people who have hatred for others based on skin color prove our similarities and that they must not like aspects of themselves, for only humans eyes see color the way we do.
Individuals who do not have love for the happiness of others are essentially held by tribal institutionalization to have the opinion, expressed or unexpressed, that those of "us' in, whatever institutionalized sense the "us' is, are somehow better than "them' and more deserving of happiness. The notion someone somehow is more deserving of happiness than someone else, say in another institutional collective, is indicative of lacking the third stage of love.
Those custodians of nature and the environment often have obtained the access to the fourth aspect of love. People who realize we are all in this together have gained the fourth level of love. People who refuse to do wrong on behalf of the institutions have gained the fourth level.
The ability to ascend in the stages of love depends on the ability to refuse to accept institutional dogmatic propaganda which is most often lies upon lies so entrenched as to go unnoticed, lies which are normally perpetuated to benefit an oligarchical collective within a collective. When one is lacking love of any aspect or stage, it becomes easier to be misled.
When one is predisposed to love one can more easily see through lies and the historical criminal discrepancies which flood the world steering those lacking love. Historical criminal discrepancies can most easily be illustrated in times preceding war and in subjects related to war. Historical criminal discrepancies are lies which are propped up and upheld as truth by all those involved in the lie for the lie suits all their masquerades and all their other lies.
When you have love you can see the historical criminal discrepancy a mile away. Take the North Korea situation unfolding currently. Everybody is hyped up and pumped up on war because of the lies of war. The lies related to the reasoning for war work for the collectives and so they propagate it and yet the truth remains, creating historical criminal discrepancies. The lie works in North Korea to maintain a war state and keep individuals fearing outsiders instead of questioning the oligarchical collective in control. For North Korea the lies work to hold control in fear and hate. And in the U.S.A. the lie works for similarly shaped oligarchical collectives to further build up military spending. When you find love you can easily refuse and reject the historical criminal discrepancies institutions use to steer us with fears.