I agree, though I wish it weren't so.

When I realized that there is a finite amount of energy and resources in the biosphere, and that they are almost all utilized, I realized we cannot avoid conflict. Life has evolved to fill every niche available, and when we acquire new resources, we are pushing competitors out. Farmland destroys previous forests and prairies, sustainable hunting and fishing requires the replacement of predators. Even in the burning of deadwood, we're using energy that fungi and bacteria would have utilized. There's no way around it, and it doesn't make me feel especially good, but nothing is free and everything is taken from something. That knowledge was a part of growing up for me, and I still think about it whenever I garden.

"..still be conflict with all other species."

That's a very simplistic and war-driven model by which to view our role in the ecosystem. To a hammer, everything looks like a nail. (That's the viewpoint I'm talking about, not necessarily you personally.)

We aren't even really in constant conflict with our own food-species, we have to insure that they survive, and are healthy, as well as the system which all of us depend on.

There is conflict, but as a presently traumatized society, we have been obsessively dwelling on it, and frequently forget how much we are also here only because of cooperative efforts, and from the ways in which we have managed to not entirely decimate the living world.. we just have to identify the positive actions that sustain us AND the natural support systems, and decide which actions, from population to pollution and over-production, over-extraction .. have created the massive problems that put us INTO complete conflict not only with the natural world, but even in conflict with our own survival, it seems.

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There's an old saw that 'You don't have to clean up the river, just stop throwing garbage INTO it.' .. quibbles aside, that's a decent first step, and the improvements would be enormous.

Conflict doesn't sort out "good" -- only "strong". Or perhaps "lucky."

Not a very profound philosophical position. And I don't think it is the best that human beings are capable of.