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DanArmak comments on Does evolution select for mortality? - Less Wrong Discussion

12 Post author: DanArmak 23 February 2013 07:33PM

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Comment author: DanArmak 23 February 2013 08:30:36PM 3 points [-]

Is the claim that evolution selects for mortality true?

Most organisms are mortal, so... yes?

The two alternatives (which I think are correct) is that immortal varieties either never arise in the first place, and so can't be selected; or else are always linked to some tradeoff or disadvantage which is selected against.

Your explanation is isomorphic to saying "most organisms die if heated to 100 degrees C, therefore evolution selects for organisms that die if heated". But the simpler explanation is that resistance to extreme heat never arises in the first place, or has a large associated cost whenever it appears. Not that such resistance is in itself harmful and selected against.

Eric Lander is a well-respected scientist in his field, but his field is not metaethics.

His field is biology, and this (seems to be) a fundamental error in biology (evolution).

Comment author: Qiaochu_Yuan 23 February 2013 08:33:48PM *  2 points [-]

The two alternatives (which I think are correct) is that immortal varieties either never arise in the first place, and so can't be selected; or else are always linked to some tradeoff or disadvantage which is selected against.

Well, this is not true. Some organisms actually are immortal.

Your explanation is isomorphic to saying "most organisms die if heated to 100 degrees C, therefore evolution selects for organisms that die if heated". But the simpler explanation is that resistance to extreme heat never arises in the first place, or has a large associated cost whenever it appears. Not that such resistance is in itself harmful and selected against.

Yes, I noticed this, which is why I removed that part of my comment.

His field is biology, and this (seems to be) a fundamental error in biology (evolution).

Again, biology has many subdisciplines and there's no reason to expect an expert in one subdiscipline to know everything about other subdisciplines. And even experts occasionally make mistakes. I mean, seriously.

Comment author: DanArmak 23 February 2013 08:35:37PM 0 points [-]

Well, this is not true. Some animals actually are immortal.

Yes, and that is weak evidence against theories that say evolution selects against immortality.

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