I have grown to embrace change. Personally, I love reading the science section in the paper every morning. I’m in awe of humankind’s boundless curiosity." On June 4, 2016, he addressed the participants at the Reason Rally in Washington, D.C. Speaking in reference to his "Star Trek" character Q, he said:  On July 14, 2017, he attended the unveiling of a statue of Clarence Darrow at the Rhea County Courthouse, Dayton, Tennessee, the site of the Scopes Trial in 1925, where Darrow had argued in favor of the teaching of evolution and secular education. In April 2019, the Center for Inquiry announced that de Lancie was scheduled to be a featured speaker in October of that year at their annual conference, CSICon. At that conference de Lancie announced two new projects. The first, an animated series titled "God's Goofs" which is meant to point out that intelligent design is absurd. For instance, how absurd is it that we eat and breathe through the same pipe? The second project is a play based on the 2005 intelligent design trial in Dover, Pennsylvania. De Lancie is married to actress Marnie Mosiman, who guest-starred as Harmony/Wisdom/Balance in "Loud as a Whisper", an episode of "". The couple have two sons: Keegan (born 1984) and Owen (born 1987). De Lancie is an experienced sailor who spends a lot of his time on the Pacific Ocean, which "sometimes involves very terrifying experiences."