After Princeton he joined the Foreign Service and was posted to Libya, where he met his wife, Nancy, and gained a lifelong interest in Libya and the broader Middle East. After a second posting in Rome, he returned to Libya with Grace Petroleum and began a career in the oil business, subsequently living in London and Texas.
In 1978 the family, now six, moved to northern Virginia, where he spent the rest of his life. He soon joined CSIS, leading its energy-security studies program and often appearing on national and local news programs.
In retirement, he and Nancy spent summers in Big Sky, Mont., enjoying the mountain air and hiking. He also embraced family genealogy, meticulously researching each generation back to colonial Pennsylvania and beyond.
Henry was a true world traveler, having visited nearly 100 countries during his lifetime. He was a longtime, beloved member of Immanuel Presbyterian Church of McLean, Va.
Henry is survived by Nancy; children Drew ’86, David ’88, Jane Renshaw, and Sarah Pereira; and by eight much-loved grandchildren.