The history of interactions among disparate peoples is what shaped the modern world through conquest, epidemics and genocide. Those collisions created reverberations that have still not died down after many centuries, and that are actively continuing in some of the world's most troubled areas.

Measles and TB evolved from diseases of our cattle, influenza from a disease of pigs, and smallpox possibly from a disease of camels. The Americas had very few native domesticated animal species from which humans could acquire such diseases.

One person making a wrong decision affects the whole country.

History as well as life itself is complicated -- neither life nor history is an enterprise for those who seek simplicity and consistency.

The King's 28 letters have been described by scholars as the world's best alphabet and the most scientific system of writing.

I personally am not conscious of my accent.

The single most important problem is our misguided focus on identifying the single most important problem!