Not sure which bookstore accepts bitcoins, but you might want to invest in a dictionary. :o) Or amazon coins, dogecoins, aurora coin, blackcoin, coinye's, dark coins, etc etc.
Consensus, from the old latin, consentīre, to feel together, agree.
Something everybody in 'a party' can agree with.
"An attacker that controls more than 50% of the network's computing power can, for the time that he is in control, exclude and modify the ordering of transactions."
-- https://en.bitcoin.it/wiki/Weaknesses
That's 50% plus one, and that's certainly not a consensus, that's majority ruling. Perhaps you don't know as much about bitcoins as you think you did/do. And if you read the link you'll notice some more issues.
And those are mainly technical issues, not even the unfair investment in power, hardware. Simple example, electricity in my country is so expensive, if you'd find a bitcoin, it would hardly cover the costs of the electricity that i spend on it.
Consensus and majority ruling are not the same. We, you and me, probably won't come to a consensus about this. But if one of us was significantly stronger then the other, you could do a majority (in muscle power) ruling and claim your way is the only way to go, and everybody should stick to that (and yes there will be very unhappy people in that situation, the other half).
The quoting of the opinion of the dogecoin author, merely is to indicate there are more people that think like me. Even authors of crypto currencies with funny dog logos. So no it doesn't make him an authority; though i think its safe to assume he is somewhat more knowledgeable about crypto currency than the average greedy miner that just buys a few GPU's and starts mining in hope of (highly speculative, e.g. previously referred to, paintings.) fortune.
http://en.wikipedia.org/wiki/List_of_cryptocurrencies
Why do you think there are so many different crypto currencies. They all are greedy and want to harvest as much in the early stages of their mining, maximum returns on investments. Or sit in that place where banks are at in our current position. (what the Winklevoss brothers now want to be).
And if i don't seem to understand, in your eyes, what proof of work is, then please elaborate. Tell please try to enlighten me about the actual work that is getting done with bitcoins (or other crypto currencies)? What is this work exactly, because as far as i have understood over the years, it's a useless hash. Art like; Art that gets created on resources, we ruin our planet for.
Only thing they managed so far in my opinion is to create a somewhat, (its not,) anonymous payment system that allows the selling and buying of things that are generally illegal. (if those things should be illegal is a different discussion).
So to get back to evolution theory, there certainly isn't a consensus on this around the world. Else why are there still people that frantically fight that idea, and claim there is a creator? People are killing each other every day over this? Trying to do a majority ruling.
Have a good and happy mining weekend :)