cause to occur or exist; "This procedure produces a curious effect"; "The new law gave rise to many complaints"; "These chemicals produce a noxious vapor"
To bring something about means to cause it to happen. The only way they can bring about political change is by putting pressure on the country. = cause
[ 'bri[ng] ] (verb.) before 12th century. Middle English, from Old English bringan; akin to Old High German bringan to bring, Welsh hebrwng to accompany.