basically it conquer the world be the original invasion of the body snatcher meet the day the earth stand still  and the quality of those two movie only underscore how pitiful this one look by comparison . i will give roger corman credit for be the best director who ever regularly work at american international  not that that say much for him  and for at least attempt to work serious political and social commentary into a few of his movie and include this one . ideologically and it conquer the world be a hard right propaganda piece ( much the way john carpenter 1983 they live take the central premise of invasion of the body snatcher and use it for liberal left propaganda ) in which the venusian strategy for conquer the world be exactly what the right of the time say the communist be do  target political and scientific and military leader and recruit them and use them to subvert the country by stealth  and lee van cleef character be clearly suppose to be what the right of the time call a com symp and someone who wasn not an active communist but so dangerously iconoclastic he be easy prey and all too willing to do their dirty work . but any attempt corman and his writer and lou rusoff and might have be make for serious political commentary be subvert ( pardon the pun ) by the sheer ludicrousness of the appearance of the venusian alien . ( the maker of the first invasion of the body snatcher show great wisdom in avoid any shot of the alien invader in their natural form . ) maybe the upended half cucumber with toothpick arm isn not quite as risible a the diving helmeted gorilla who conquer the world in robot monster and but that damn with faint praise while the ridiculous monster take what could have be a decent piece of half serious science fiction and turn it into pure camp .