Seed Banks

Maintaining seed diversity is a growing concern in this era of big corporations and patented seeds. It's a very involved topic that I'm not going to go into at the moment, considering I'm only on the edges of it in terms of research, myself. 

A few organizations are devoted to trying to keep seed diversity alive, however, if you want to help support them or learn more about the topic.

http://foodtank.com/news/2013/07/fifteen-seed-saving-initiatives-protecting-biodiversity-for-future-generati

These really are worth supporting, especially as some of these are in danger due to finances and other concerns.