We can for example be fairly confident that either there will be a world without war or there won't be a world - at least a world inhabited by creatures other than bacteria and beetles with some scattering of others.

For the first half of geological time our ancestors were bacteria. Most creatures still are bacteria and each one of our trillions of cells is a colony of bacteria.

I think the biggest thing is clean as you go. Wash all your knives cutting boards dishes when you are done cooking not look at a sink full of dishes after you are done. Cleaning as you go helps keep away cross contamination and you avoid having food borne bacteria.

Back in 1983 the United States government approved the release of the first genetically modified organism. In this case it was a bacteria that prevents frost on food crops.