Fanatical, or obsessed with one cause or idea to the exclusion of other concerns.(adjective)
Of or relating to a monomaniac.(adjective)
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Use "monomaniacal" in a sentence
"Hiring help does not solve the problems with the "monomaniacal" culture of science."
"One thing was clear, though--I was never going to be a professor of anything if it meant that kind of monomaniacal passion."
"The worst offenders are the Blue Dog caucus of Democrats from conservative districts who are positively obsessed, with a kind of monomaniacal zeal, on balancing the budget and matching revenue to expenditures."