Marc Andreesen

The reality is the world is a really, really big place, and there's a lot of people running around with a lot on their mind. And you really have to figure out how to build a company that can put on a message that can actually reach people and have an impact globally.

Hammer down product fundamentals first. Make sure you've got something that works before doubling down on promotion and marketing. Create a groundswell of organic support, and only then leverage PR and advertising to spread the word.

I want to tell mayors, county chiefs and heads of big companies: don't just chase GDP growth; don't chase the biggest profits at the expense of our children and grandchildren and at the cost of sacrificing our ecological environment.