Imagine if in another 250 years, the USA still has a system of government substantially similar to its present day form, but with a population of tens of billions spread across several planet Earths in alternate dimensions. Most people are wealthy enough to own a personal spaceship. Medicine has advanced to the point where doctors can bring you back from the dead as long as your brain is more or less in one piece. But now everyone judges the people of the 21st century for eating meat - it's considered pretty much the worst thing that anyone can do. Maybe you'll be convinced that you were wrong to eat meat, or maybe you won't. Even if you're convinced that you were wrong, maybe you'll think that the people of the future should have left wild animals alone rather than intervening to eliminate predation. But overall you would probably think the future was going rather better than you expected...