Warren Buffet kept on giving in 2012 - to the tune of over $21M. Ultimately plans to give his entire fortune of over $50 Billion to charitable causes.

OMAHA, Neb. (AP) — Billionaire Warren Buffett gave Berkshire Hathaway stock worth $21.6 million away in the second half of 2012.

Buffett revealed the donations Monday. Buffett, who is Berkshire's chairman and CEO, made donations of Class B shares to four unnamed charities and three individuals between September and December.

The biggest single gift reported Monday was 172,375 shares worth $16.6 million given to a nonprofit.

These gifts are in addition to the 22.4 million Class B Berkshire shares Buffett gave to the Bill & Melinda Gates Foundation and the four Buffett family foundations that are slated to eventually distribute most of Buffett's fortune.

Buffett has said he plans to eventually donate all of his 350,000 Class A and 3.5 million Class B shares of Berkshire stock worth more than $51 billion to charities.

Bill Gates has a measured plan to fix the world's problems...

Bill Gates in his own words from the Wall Street Journal:

We can learn a lot about improving the 21st-century world from an icon of the industrial era: the steam engine.

Harnessing steam power required many innovations, as William Rosen chronicles in the book "The Most Powerful Idea in the World." Among the most important were a new way to measure the energy output of engines and a micrometer dubbed the "Lord Chancellor" that could gauge tiny distances.

Such measuring tools, Mr. Rosen writes, allowed inventors to see if their incremental design changes led to the improvements—such as higher power and less coal consumption—needed to build better engines. There's a larger lesson here: Without feedback from precise measurement, Mr. Rosen writes, invention is "doomed to be rare and erratic." With it, invention becomes "commonplace."