Why on earth are humans in this predicament? Same as always—selfishness, mainly.
The past is what we see in the rear-view mirror. For some, this innocuous reflective device serves as a first-line navigational aid. They go forward, knuckles whitened, by looking backward.
Love is not attachment. The man is free who is attached to nothing.
Problems proliferate whenever we hang on to something, when we cling to it.
Ego is the energy of attachment, of clinging-ness, to name, gene pool, job title, wealth, physical appearance, education, family. These are not wrong, just temporary. So ego is also the energy of fear.