[JoeAltmaier]

Maybe a little harsh. Rivers do nothing but jam up and break up logjams, have for millions of years. Maybe it's healthy.

Here in the US, the environment was mostly chains of stagnant beaver ponds for millennia. It was the Iroquoi Confederacy that kilt them all, broke up the dams. For money - beaver hats in Europe were all the rage. Remade the topology of a continent in a few score years.

So it works both ways.

[stazz1]

In the Egyptian Book of the Dead, one of the things you had to attest to at death was that you had "never willfully blocked the flow of a river" -- makes sense given the prominent importance of the Nile. With respect to your comments, I think that temporary logjams and permanent human dams are not comparable.

[JoeAltmaier]

Remains to be seen if the human dams are permanent!

In the scheme of nature, humans are just a blip so far.

[stazz1]

Truly, if you consider the life of a redwood, just a blip on its radar