Google NGRAM for kin selection

Here's the Google NGRAM for group selection, kin selection, inclusive fitness, multilevel selection. It is interesting, I think.

Group selection is surprisingly popular

Some statistics follow:

Google trends:

Google NGRAM:

Google scholar:

• "group selection": 66,000;
• "kin selection": 29,300;
• "inclusive fitness": 21,500;

Even if you add together the "kin selection" and "inclusive fitness" volumes, "group selection" often comes out on top.

Group selection doesn't look particularly down-trodden - from this data.