The question we are confronted with is a collective one, and it concerns us all. Why are so many of us, our fellow humans, behaving so badly? And not only badly, but in a way that is detrimental to our own well-being. It would seem more than strange, verging on the insane, that any creature would wish to deliberately harm its own environment and support systems. Yet for us humans we have the significant added factor of being conscious of our actions, and self-conscious in our reflective understanding. So, again, to ask – what has gotten into our minds?

It appears that this question has been asked many times in the past, over and over, by many thinkers, philosophers, sages, and mystics. It is a question that has concerned a great number of people for a long time. And yet I can only suspect that the issue is of great concern today because for the first time in our human history we are behaving as a global species. With our communication technologies we are sharing our ideas, stories, opinions, and the rest, all across the planet. We can know almost instantly some news from a far-flung corner of the world. And so, at this time in our human history, a negative presence in our collective mindset would be disastrous.

It is my suggestion that a mental contagion has entered the collective human mindset; that is, into our collective consciousness. Briefly, I shall discuss this in regard to the work of psychologist C.G. Jung.
Jung & the Invasion of the Collective Mind — by Kingsley L. Dennis