Mindless

Adjective

 * 1) Showing a lack of forethought or sense.
 * 2) Having no sensible meaning or purpose.
 * An act of mindless violence.
 * 1) Heedless.
 * 2)  Overly repetitive and unchallenging.
 * 3) Lacking a mind.
 * Atheism alleges that mindless scientific forces control the universe.

Thesaurus
a stranger to, aimless, airy, aloof, anarchic, angry, animal, animalian, animalic, animalistic, apathetic, asinine, asleep, ataractic, beastlike, beastly, bestial, blase, blind to, blustering, blusterous, blustery, bored, brainless, brutal, brute, brutelike, brutish, careless, casual, caught napping, causeless, chaotic, cursory, dead to, deaf to, degage, designless, detached, devil-may-care, disinterested, dispassionate, disregardant, disregardful, distant, driftless, dumb, dysteleological, easygoing, fatuous, flippant, foolish, forgetful, frantic, free and easy, frenzied, fruity, furious, haphazard, headless, heedless, hellish, idiotic, ignorant, ill-advised, ill-considered, ill-contrived, ill-devised, ill-gauged, ill-judged, imbecilic, impassive, impercipient, impolitic, imprudent, in ignorance of, inadvisable, inattentive, incognizant, inconsiderate, incurious, indifferent, indiscreet, indiscriminate, inept, inexcitable, inexpedient, inexplicable, infuriate, injudicious, insensate, insensible, insensible to, insouciant, instinctive, instinctual, irrational, lackadaisical, lackbrained, lazy, lean-minded, lean-witted, listless, lunatic, mad, maniac, mental, misadvised, misguided, moronic, myopic, napping, negligent, nitwitted, non compos mentis, nonchalant, nonconceiving, nonrational, not bright, not with it, nuts, oblivious, obtuse, of little brain, offhand, orgasmic, orgastic, out of it, pandemoniac, pea-brained, perfunctory, phlegmatic, pin-brained, pococurante, promiscuous, purposeless, raging, random, ravening, raving, reasonless, reckless, regardless, respectless, rip-roaring, senseless, shortsighted, silly, slackminded, slackwitted, stochastic, stolid, storming, stormy, stray, stupid, subhuman, tactless, tempestuous, thick, thickheaded, thoughtless, troublous, tumultuous, turbulent, turned-off, unaccommodating, unaccountable, unadvised, unanxious, unaware, unaware of, uncomplaisant, unconcerned, unconscious, unconscious of, unconsidered, uncooperative, undiplomatic, undirected, undiscerning, undiscriminating, unforeseeing, ungifted, unhearing, unheedful, unheeding, unhelpful, uninquiring, uninsightful, unintellectual, unintelligent, uninterested, uninvolved, unknowing, unmindful, unmindful of, unmotivated, unobliging, unperceiving, unprehensive, unprepared, unready, unrealizing, unreasonable, unreasoning, unreflecting, unreflective, unseeing, unsensible, unsolicitous, unsound, unsuspecting, untactful, untalented, unthinking, unthoughtful, unwise, unwitting, uproarious, wild, withdrawn, witless, zoic, zooidal, zoologic