Are we in the middle of a gratitude movement? Evidence suggests so. Publishers can't seem to print enough books with the words gratitude" or "gratefulness" in the title. Scientists rake in millions of dollars in grants to study how feelings of gratitude might improve physical health and psychological well-being. And this weekend, hundreds are expected to attend a Pathways to Gratefulness conference [in San Francisco] to talk about cultivating gratefulness in their lives. Among the participants is Brother David Steindl-Rast, an 85-year-old Benedictine monk, considered the spiritual leader of the gratitude movement. The author of Gratefulness, the Heart of Prayer ... and A Listening Heart ..., Steindl-Rast will be joined by an eclectic collection of writers, poets, spiritual teachers and scientists involved in the fast-growing field of gratitude research. One of those scientists, Emiliana Simon-Thomas, is director of the Greater Good Science Center at UC Berkeley, which controls a $5.9 million grant from the John Templeton Foundation to fund a project called Expanding the Science and Practice of Gratitude. Simon-Thomas ... said the Berkeley center is considering 60 research proposals, including many from the leading brain science laboratories in the United States. Some of the research would build on studies already conducted by UC Davis psychologist Robert Emmons, who cites "scientific proof that when people regularly work on cultivating gratitude they experience a variety of measurable benefits - psychological, physical and social."