As both developed and developing nations search for alternative sources of energy in response to the growing energy crisis, we at Acumen Fund believe that investing in entrepreneurs who provide innovative energy solutions is an increasingly critical part of the solution.

I think I still have a great sense of adventure and trust, and am surprisingly idealistic given all the horrible things I've seen since I was 25. I think how I have changed is that I have a much deeper understanding of the dark forces in the world, of power.

Even when early innovations start to succeed, it is not uncommon to see growing businesses sabotaged for threatening the status quo.

Impact investing has become a broad umbrella that includes all investing with a focus on both financial return and social impact, but in its best form, impact investing prioritizes impact over returns and achieves outcomes that traditional investing cannot.

When a government goes to war, particularly a democracy, it is the most solemn and awesome responsibility of our leaders - to decide to send our kids to go off and kill and die for us.

Investing in management means building communication systems, business processes, feedback, and routines that let you scale the business and team as efficiently as possible.

Humility is a great quality of leadership which derives respect and not just fear or hatred.

Leadership is solving problems. The day soldiers stop bringing you their problems is the day you have stopped leading them. They have either lost confidence that you can help or concluded you do not care. Either case is a failure of leadership.