(3/3) The light of evolution: What would be lost

What good is evolution? Do we really need it? Are there any applications for it? Does it have any bearing on human health? Why would a doctor or engineer or teacher or politician need to understand it, beyond the need to satisfy an educational directive? Does it really affect our lives?
Useful or interesting links:

Understanding Evolution (basic material)
http://evolution.berkeley.edu/evolibrary/home.php

Yale Peabody Museum of Natural History (fantastic videos)
http://www.peabody.yale.edu/exhibits/treeoflife/index.html

"Nothing Makes Sense Except in the Light of Evolution" by Theodosius Dobzhansky, 1973
http://people.delphiforums.com/lordorman/light.htm

Francisco Ayala debate with William Lane Craig
http://www.youtube.com/watch?v=8IY1JffZyRw
Journal articles for further reading:

Free full-text article on XMRV's role in prostate tumor
http://www.pnas.org/content/106/38/16351.full.pdf

Free full-text "Genomics meets HIV-1" on HIV vaccine targets enabled by genomic research
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2043131/pdf/nihms29212.pdf

How HIV-1 research is being used to treat FIV in cats
http://www.retrovirology.com/content/pdf/1742-4690-4-79.pdf

Selective Sweeps in the Human Genome: A Starting Point for Identifying Genetic Differences Between Modern Humans and Chimpanzees
http://mbe.oxfordjournals.org/cgi/reprint/19/12/2342

Quantitative Trait Loci mapping of crops
http://www.plantcell.org/cgi/reprint/12/12/2473

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