"Introducing rabbits to Australia. Mongooses to Hawaii. Must be a lot like this if I put my mind to it.

What's your point?"

Well, first I seem to recall that part of England's national security policy was maintain lumber for ship building of it's navy. But other than the fact that there was other places in the world which had more lumber [and better lumber] for building warships, I don't see what mean by there being any horrible or good consequent.

As for rabbits and Mongooses, it a rather minor issue- other than providing an example of the stupidity that goverment is capable of. And you are right there a lot stupid things that goverments do- some with little in terms of bad consequence or others with a significant amount of bad consequences- like for instance, the Kyoto Treaty.

And obviously the private sector and Charity groups can also do lots of things wrong, e.g: "Disaster donations help Islamic vigilante force impose punishments on women"
http://www.timesonline.co.uk/article/0,,2089-2508262,00.html
[linked from instapundit]
Of course government can also do good things:
"Civil war or not, Iraq has an economy, and—mother of all surprises—it's doing remarkably well. "
http://www.msnbc.msn.com/id/16241340/site/newsweek/
{also linked from instapundit}.
You could quibble about the above- I didn't intend them to be examples of major issues but rather most recent examples. And obviously it's possible that more about these examples will in become known from a historical prospective.
The consequences of "Silent Spring" were much more significant: tens of millions of people killed, hundreds of milllions of people suffering severely for prolonged periods and a large factor in creating poverty. All because some horrible lady and her psendo science- and of course a guillible and foolish public.

"Gathering wood for burning, further and further away from ancient Mexico City, without any forestry planning, till the wood was so far away that the city was no longer viable."

Ok, so Mexico City, the logging town becomes a city. And the problem is what? Coal wasn't available? Oil fields weren't discovered yet? If wood fell magically from heaven, too many people burn it, so that there would be a permanent dark cloud over the city making life less enjoyable for those living there.
In other words if there was no shortage of wood, you would be bitching about various theories about it running out AND all the smoke it creates. Not mention the evils of tree farming and the depletion of virgin forests AND the fat cats who would be running the planned forests in Mexico city [assuming they weren't in short order clear cut to make way for some grand palace].
And let's not forget about all the laws concerning trees growing in your backyard. This of course is assuming that any one would have a backyard or own anything in this planned forest laden "city".