I consider the general a friendly opponent. And as I said, I am from Missouri, show me. The 14 month period of advantage(although the way I read the graph it carries on into about 24 months) for the HbAS carrier is to be compared to the disadvantages of the trait carried to around 10 years or 120 months. That period is much longer before reproductive capability.
Andrew, the graph indicates mortality rate. If they die at an increased percentage the alleles they carry die with them. Thus you have allele frequency change in the population.
In this case the Hybrids are preserved over the AA dominant type and the S allele increases. Whereas, in a non-malarial area, the A allele increases in frequency. In both cases evolution occurs and the populations in non-malarial areas diverge from the malarial areas.