The logo is 3 colors and I attempted to stick as close to the description of what you wanted. Although I do not have the people as the roots of the tree, they are the trunk. It is bright and hopeful like the cause you are working for. Epilepsy has struck my family hard recently and anything that might help find a solution to such a debilitating problem would make me feel like I have helped in some way. Please let me know if any changes can be made. I will be posting more logos in hopes of possibly creating something that might fit your brief.