Ok well if it's a conversation about social justice and the future of equality and all the good things we can strive for, I'll bite and accept that it would be grand for all humans to live forever, zooming through the stars in benevolent brotherhood and sisterhood.
For now, humans continue to exploit their environment and each other for personal gain. Our history does not indicate a drastic shift in this trajectory any time soon. If we can actually learn to live in love, then maybe you're right. I am confident in my opinion that we're too immature, collectively, to even consider immortality as having a generally beneficial effect on our species.