50 Cent has been making his presence known in the hip-hop world again, via his new "Street King" movement, which consists of a series of tracks he's leaked over the past several weeks, as well as an energy shot drink with proceeds helping to feed African children ... the goal being one billion.

Taking a page outta his former G-Unit artist Prodigy's book, the hip-hop mogul is speaking out against the greedy elite, whom he says -- in a recent PSA, posted at ThisIs50.com -- has programmed us not to care about the neediest and poorest people in the world. And, he's not having it. In a written PSA, posted on Saturday (October 22), 50 sounds off, asking people to open their eyes and see how corrupt the powers leading the world are.