Crises bring out both the best and the worst in human behavior. For evidence of the latter, look no further than Pat Robertson blaming the Haiti earthquake on a long ago pact the island apparently made with Beelzebub, or Rush Limbaugh claiming Obama's relief efforts were designed to curry favor with "the light skinned and dark skinned black community." At the same time, the catastrophe has triggered what Jeremy Rifkin calls "a global empathic response" and an outpouring of compassion and charitable giving (texting alone has already produced $11 million in aid). HuffPost Impact is doing its part via its online store where you can buy and send desperately needed supplies to Haiti, including medicine, first aid kits, and water purification tablets. We've also set up a guide to the most effective groups accepting donations for relief efforts.