“At least five major ice ages have occurred throughout Earth’s history: the earliest was over 2 billion years ago, and the most recent one began approximately 3 million years ago and continues today (yes, we live in an ice age!). Currently, we are in a warm interglacial that began about 11,000 years ago.” https://geology.utah.gov/map-pub/survey-notes/glad-you-asked/ice-ages-what-are-they-and-what-causes-them/
I don't have time to find a link. But, as I understand it, we have more warming to go before the ice comes back. We can expect more vibrant plant growth, higher oxygen levels, more live giving rain and a healthier planet over the next several thousand years.... if our understanding of geological history is an accurate indication of the future. Imagine how crops will grow year round in Nebraska, Kansas, Illinois, Indiana, etc. when they can plant, cultivate and harvest year round. Hell, Texas might be able to grow rice.