The 21st century, which will most probably last from 2001 AD to 2100 AD will be decisive for the survival of humanity on Earth. With no other period in history have so many expectations been heeded as with the first century of the third millennium.
After surviving the Cold War, the nuclear arms race, two World Wars, several genocide attempts, and various flavours of totalitarian regimes, mankind will now have to find solutions and answers to various other problems:
The above list is by no means complete. It is just an example of how complex future issues will be compared to the ones of the 20th century, which were dominated by rather simple dichotomies, such as East vs. West, peace vs. war, democracy vs. totalitarianism, etc.
Below is an index to nodes about particular years, compiled for your browsing pleasure.
2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009
2010 - 2011 - 2012 - 2013 - 2014 - 2015 - 2016 - 2017 - 2018 - 2019
2020 - 2021 - 2022 - 2023 - 2024 - 2025 - 2026 - 2027 - 2028 - 2029
2030 - 2031 - 2032 - 2033 - 2034 - 2035 - 2036 - 2037 - 2038 - 2039
2040 - 2041 - 2042 - 2043 - 2044 - 2045 - 2046 - 2047 - 2048 - 2049
2050 - 2051 - 2052 - 2053 - 2054 - 2055 - 2056 - 2057 - 2058 - 2059
2060 - 2061 - 2062 - 2063 - 2064 - 2065 - 2066 - 2067 - 2068 - 2069
2070 - 2071 - 2072 - 2073 - 2074 - 2075 - 2076 - 2077 - 2078 - 2079
2080 - 2081 - 2082 - 2083 - 2084 - 2085 - 2086 - 2087 - 2088 - 2089
2090 - 2091 - 2092 - 2093 - 2094 - 2095 - 2096 - 2097 - 2098 - 2099
2100
20th century - 21st century - 22nd century
Further linkage: