There is no such thing as "harmony" in nature. Species come and go, some destroy their own habit, others drive their competitors to extinction. We do need to be

There is no such thing as "harmony" in nature. Species come and go, some destroy their own habit, others drive their competitors to extinction. We do need to be careful about how we use natural resources and that we don't change our environment in a way that is detrimental to us. But understand that change is the status quo for nature, that's especially easy to miss when it happens on timescales longer than a human life, but happen it does.