If human evolution is taught in biology class, then the idea of an intelligent force creating the universe ought to be taught in philosophy or another required class, a Utah senator told state school officials Wednesday.

But State Office of Education leaders, who met with Sen. Chris Buttars, R-West Jordan, on the matter, don't want to add that instruction, curriculum director Brett Moulding said.

If the two sides can't compromise, Buttars says he'll carry a legislative bill to make sure that they do.

"Legislation is a last resort," Buttars said. "I'm still working on it, but I'm really not highly hopeful we'll come to a consensus."

The issue surrounds human evolution and the concept of "intelligent design," based on the idea that life is too complex to be explained solely by Charles Darwin's theory of natural selection and evolution.

Critics say intelligent design is a thinly veiled reference to God and divine creation. And state education officials say that can't be taught in public schools under a 1987 U.S. Supreme Court decision.

Buttars, however, says intelligent design says nothing about God. Intelligent design reportedly has gained support in school districts in 20 states.

Evolution of species is central to Utah's high school biology core curriculum. While the curriculum doesn't single out human evolution, Moulding says humans are classified within the animal kingdom. Teachers' lessons may vary on the subject.

"I think our teachers respect individual students' beliefs they bring to the classroom," Moulding said. "So, they're very supportive of teaching evolution as a science, as a way of knowing that's distinct from other ways of knowing, such as religion."

But Buttars says some parents don't like what's happening in classrooms.

"I'm not willing to continue to get calls and e-mails and faxes from parents saying, 'Why are they teaching my kid we evolved from apes in school as a fact? (and that) it's causing great conflict in our family,' " Buttars said. "Kids are very impressionable. They look up to schoolteachers."

Wednesday, Buttars met with State Superintendent of Public Instruction Patti Harrington, State Board of Education member Tim Beagley, State Associate Superintendent Christine Kearl and Moulding. The meeting, which Moulding said lasted 30 minutes, was described by both sides as cordial.

Buttars said intelligent design should be taught to balance human evolution talks. It wouldn't have to be taught in science but possibly a required philosophy or humanities class.