# Why are some people left-handed?

- Institution: TED
- Department: TED-Ed
- Speaker: Daniel M. Abrams
- Year: 2015
- Level: For everyone
- Language: English
- Subjects: Biology, Medicine and health, Engineering, Society and politics, History, Art, architecture and design
- Source: [TED](https://www.ted.com/talks/daniel_m_abrams_why_are_some_people_left_handed)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Today, about one-tenth of the world's population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitive and cooperative pressures on human evolution. \[Directed by TED-Ed, narrated by Addison Anderson, music by Michael Dow\].

## Lectures

1. [Why are some people left-handed?](https://invisiblenetwork.ai/learn/ted/daniel_m_abrams_why_are_some_people_left_handed/0a8b1d4c01db), 5 min (TED's player)