"Is morality unique to humans? "
Only in a "homo sapiens" centric model of the universe. Sort of like when the earth was considered to be at the center of the universe.
Far more is known about evolution than gravity. There is no "theory" yet that unifies gravitation and quantum theory. Gravitation is not even bounded by the universe in some theories.
Since it is close to Halloween, one thing I always find interesting is the many rules for "ghosts" that people have invented over the ages. One of the "rules", as far as I can tell, is that ghosts won't appear if there are "skeptics" i.e. people that don't believe in ghosts, present. This to me...
it ia illogical to think a mythical man-god would die to save one from their "sins" for what would have to be a small subset of the world population. In any case, blood sacrifices are part of our barbaric history.
The point is, there was no historical Jesus, just a made up one, and nobody can point to a SPECIFIC man, and more importanly THE SPECIFIC TRAITS, of a real Jesus that supposedly existed. :D
Admittedly, Gould's "The Structure of Evolutionary Theory" is for serious readers only, however most of Gould's other books are very entertaining. Dawkin's "The Ancestor's Tale" should hold a person's interest though. I attended a lecture given by Gould once given at the local public library; a...
"Right" and "wrong" evolve with societal norms, which are made to prevent chaos and anarchy.
Take away the police and all law enforcement, and see how long "right" is maintained in a society.
Actually, 99.xx percent of people really don't know how evolution works. Read Dawkin's monumental work "The Ancestor's tale", or Gould's monumental work "The Structure of Evolutionary Theory" if you really want to be in the know.