When he left college, Bill Gates says: 'There are some things I wish I had known'

• Microsoft's co-founder, Bill Gates, offers his best advice to 2017's college graduates.
• Gates tweeted Monday about his biggest regret when he left school, the most inspiring book he's ever read and what career fields he believes are the most promising today.
• Gates encourages students to solve the world's problems, to "make the most" of life.

J. Countess | WireImage | Getty Images

Microsoft co-founder Bill Gates just gave his best advice to 2017's college graduates, and offered them a special graduation gift.

Gates took to Twitter on Monday morning, saying if he were just beginning his career today, he would pursue something in artificial intelligence, energy or biosciences, all of which are "promising fields."

He added that his biggest regret when he left school was that he didn't know enough about "the world's worst inequities," something that has now taken him decades to learn, he said.

Gate's gift to graduating students would be what he calls the most inspiring book he's ever read, Stephen Pinker's "The Better Angels of Our Nature."

"This is an amazing time to be alive," Gates tweeted Monday. "I hope you make the most of it."

See the full list of Gates's tweets below:

@BillGates: 1/ New college grads often ask me for career advice. At the risk of sounding like this guy…

@BillGates: 2/ AI, energy, and biosciences are promising fields where you can make a huge impact. It's what I would do if starting out today.

@BillGates: 3/ Looking back on when I left college, there are some things I wish I had known.

@BillGates: 4/ E.g. Intelligence takes many different forms. It is not one-dimensional. And not as important as I used to think.

@BillGates: 5/ I also have one big regret: When I left school, I knew little about the world's worst inequities. Took me decades to learn.

@BillGates: 6/ You know more than I did when I was your age. You can start fighting inequity, whether down the street or around the world, sooner.

@BillGates: 7/ Meanwhile, surround yourself with people who challenge you, teach you, and push you to be your best self. As @MelindaGates does for me.

@BillGates: 8/ Like @WarrenBuffett I measure my happiness by whether people close to me are happy and love me, & by the difference I make for others.

@BillGates: 9/ If I could give each of you a graduation present, it would be this--the most inspiring book I've ever read.

@BillGates: 10/ @SAPinker shows how the world is getting better. Sounds crazy, but it's true. This is the most peaceful time in human history.

@BillGates: 11/ That matters because if you think the world is getting better, you want to spread the progress to more people and places.

@BillGates: 12/ It doesn't mean you ignore the serious problems we face. It just means you believe they can be solved.

@BillGates: 13/ This is the core of my worldview. It sustains me in tough times and is the reason I love my work. I think it can do same for you.

@BillGates: 14/ This is an amazing time to be alive. I hope you make the most of it.