>But when you get down to matters of morality and ethics, I believe we do see a clear progression over time.
"Morality" and "ethics" do not have clear objective definitions, nor do they exist on a straight continuum. Most practical applications of morality and ethics are complex and involve a substantial portion of grey area. Morality and ethics change based on the perspective of the culture; they change based on time and place. This should show that, barring a few simple cases, they are not objective verities.
However, most humans do end up falling back to the same social structure and basic social codes. They do, after a few generations, admit defeat and openly reject what many a century prior had considered the society's moral manifest destiny. It is true that over time, numerous cultures and societies have attempted to modify these basic structural arrangements, but invariably these entities dissolve and humanity as a whole continues in a manner that is quite similar to how it has always continued.
When you're discussing how future generations will perceive things, it is best to do it with a historical perspective that considers more than a single place and more than 100 years of history. I believe that if one does this, the likelihood that any specific social agenda that's not the basic one dictated by the fundamentals of human biology and sociology (the universal rules around pairing, mating, and raising children) will be accepted as self-evident truth becomes quite remote.
>Most people are good in the sense that they do not want to harm other living beings; caring about animal suffering is just a natural outcome of that. In other words, most people don't need to be convinced on the merits of the issue. What most don't yet realize is the huge extent of the problem, and that there are good alternatives.
There's a big difference between opposing the extreme tactics of factory farms and opposing animal captivity in general. Blackfish's producers and supporters oppose captivity in general, and are trying to generate outrage with the orca as their first test case.