The 21st century started in 2001 and will extend through 2099. It is the century in which humanity currently exists and has already been marked by significant change. The new century, along with the advent of a new millennium, has ushered in a wave of technology that has literally changed the way in which people live. The 21st century is defined by smart technology that has automated entire aspects of life. Smart phones now allow people a wealth of information at their fingertips, while computers are so common, it is odd for people to NOT have access to one. Self-driving cars are hitting roads and globalization continues to take root. People are no longer limited by geographical location; the advent of technology allows someone in Australia to form a friendship (or even a relationship) with someone in Kansas. However, not all changes have been focused on technology in the 21st century and not all changes have been positive.
The physical environment of the planet continues to change in the 21st century, and research indicates that in the 21st century, there will be unprecedented changes to the climate that will change the way in which people interact with the world around them. Major climate shifts will likely continue to make the 21st century, as well as changes in political structures in developed countries, approaches to social policy and education and a continued diversification of cultures in every corner of the world.