2015 Official

: In April 2015, Google released a major algorithm update—nicknamed Mobilegeddon —which prioritized mobile-friendly websites in search results. This forced businesses worldwide to adapt to a "mobile-first" world.

is widely considered the greatest year in modern gaming history, rivaling 1998 and 2007.

: Africa celebrated a full year without a single naturally occurring case of polio.

As we look back from the vantage point of 2026, 2015 feels both familiar and distant. It was the last full year before the Brexit referendum and the election of Donald Trump – events that would reshape Western politics. It was the year before Pokémon GO would make augmented reality a mass phenomenon, and before TikTok would emerge to change social media forever. In 2015, we still had hoverboard fires (the self-balancing scooters that were the hot holiday gift), but we had no idea that a global pandemic was just five years away. : In April 2015, Google released a major

The breakthrough gene-editing tool CRISPR-Cas9 was named the "Breakthrough of the Year" by Science magazine. It opened new, controversial possibilities for treating genetic diseases.

Should I focus on a ? (e.g., US history, European history, global focus)

The musical Hamilton opened on Broadway in August, transforming musical theater and pop culture with its hip-hop-influenced retelling of American history. 4. Business and Science Breakthroughs : Africa celebrated a full year without a

In 2015, international attention was gripped by the single largest influx of refugees and migrants into Europe since World War II. Driven primarily by the escalating civil war in Syria, over one million people crossed the Mediterranean Sea. This mass movement triggered profound debates regarding border control, human rights, and regional unity, fundamentally redrawing the electoral map of Western Europe for years to come. The Joint Comprehensive Plan of Action (JCPOA)

The movement gained significant momentum and global visibility. Widespread protests sparked vital national conversations about systemic racism and police accountability. Technology and the Mobile Revolution

Millions of refugees, largely fleeing the Syrian Civil War, crossed into Europe, sparking intense political debate across the continent. It was the year before Pokémon GO would

In July, the Ethereum blockchain officially launched. By introducing smart contracts, it laid the foundation for decentralized applications (dApps) and the modern crypto ecosystem.

and became the anthem of a generation that just wanted to dance while the world changed. The Lesson of 2015 The deepest problem we face, much like the deepest problem with deep learning

In a landmark 5-4 ruling on June 26, 2015, the U.S. Supreme Court decided the case of Obergefell v. Hodges. The decision guaranteed the fundamental right to marry for same-sex couples under both the Due Process Clause and the Equal Protection Clause. The ruling sparked massive celebrations nationwide and solidified a civil rights shift. The Peak of the Streaming Wars Transition