Sometimes, implementing wide-reaching social change takes surprisingly few materials. With just a handful of bike gears, MIT professor Amos Winter is hoping to change the developing world forever.

Screenshot from the video on the CNN page. Click for more on this story.

Winter is the inventor of the Leveraged Freedom Chair (LFC). It is a low-cost wheelchair powered by two hand levers that function in a similar manner to gears on a bike. The higher you grab it, the more leverage you get when traversing over rough terrain like sand, mud, or unpaved road.

Grab down lower, and the machine can cruise along tarmac at five miles-an-hour. It is one of the most versatile wheelchairs on the market, and for the time being, it is aimed solely for disabled communities in the developing world.

For more on this story, visit: Revolution, in the shape of a wheelchair – CNN.com.