It's a shame that people starve to death even in the midst of plenty.

Literal

Abundance [possessive-の] middle [at-に] even-[あっても] starve-to-death people [subject-が] exist [nominalizer-の] [topic-は] regrettable thing-[assertion-である]

The concessive ~ても pattern on the verb ある yields あっても ('even (being) in'). Nested structure: the clause '餓死する人がいる' is nominalized with の, topicalized with は, and commented on with '残念なことである'. である is the formal written copula (more literary than だ).