It become our *responsibility* to assist animals/plants/whatever that may be in danger of extinction as soon as we began the process of unnatural selection... That is to say, human beings have disrupted the worlds ecosystems to the point where some of them may be unrecoverable. It's our job not to subvert natural selection, but to preserve as much of the natural order as we possibly can...
Environments change all the time, but not at the rate that they are now.. Natural selection can't keep up with changes humanity is bringing to the environment...
Let the strong survive then, and the let the chips fall where they may? ....
sure.... ... but once one small part of the ecosphere breaks down, and something can't step in and replace that part, then humans are gonna be pretty much hosed....
Bears are omnivores, and basically at the top of their food chain. This white coloring is likely not a disadvantage in natural settings.. Bears eat plants and fish, both of which are not caught with more difficulty by a white bear over a black one..
But if you want to keep looking at it as a "save the weak from extinction", then think of it this way: This bear likely has a few dormant strands of DNA that were previously recessed.... Perhaps his childrens galbladders will be the next colon-cancer cure... And then when I get colon-cancer, he can save MY weak ass from extinction...
But perhaps not...
The fact that he is different should be reason enough to do whatever we can to preserve him though....