Creating an environment for impact

The serendipity of impact: the best results often occur from the unexpected encounter: "Take the field of chemistry, for example, where everything from penicillin to was discovered by accident — nobody was looking for them.” But because they were really good at setting up these experiments and getting the right procedures and teams in place, they made it more probable that these coincidences would happen."  How do you create similar environments to help foster innovation?