Some of the major highlights from 2015 include:

• Paris Climate Agreement: In December 2015, the Paris Climate Agreement was signed by 196 countries with the goal of reducing greenhouse gas emissions to limit global warming to well below 2°C.
• Syrian Refugee Crisis: The ongoing Syrian civil war and the rise of ISIS led to a significant increase in the number of refugees seeking asylum in Europe, which became known as the "Syrian refugee crisis".
• Black Lives Matter protests: Protests against police brutality and racial injustice, sparked by the deaths of African Americans such as Michael Brown, Eric Garner, and Freddie Gray, gained national attention under the Black Lives Matter movement.
• Marriage Equality: In June 2015, the U.S. Supreme Court legalized same-sex marriage in all 50 states, a landmark decision for the LGBTQ+ community.
• The Rise of ISIS: The Islamic State of Iraq and Syria (ISIS) continued its territorial gains in the Middle East, particularly in Syria and Iraq, and carried out several high-profile terrorist attacks around the world.
• European Migrant Crisis: Europe faced a large influx of migrants and refugees from war-torn countries such as Syria and Afghanistan, leading to political and social tensions within the European Union.
• Spectre and Meltdown: Major vulnerabilities in computer processors were discovered, known as Spectre and Meltdown, affecting billions of devices globally.
• China's Stock Market Crash: China's stock market experienced a significant crash in June 2015, causing global economic concerns.