February marks the 200th anniversary of naturalist Charles Darwin’s birth, and 2009 is the 150th anniversary of the publication of his “On the Origin of Species.” Several essayists from the original This I Believe series were influenced by the theory of evolution, including Darwin’s own grandson. Click the links below to read how these writers balanced science, faith and belief.

1. A Hope for Bettering Humanity
2. A New Control of Destiny
3. What Science Proves
4. An Inner Urge to Perfection
5. The Directing Force of Primordial Particles