Primer

Justin Helps, better known online as Primer, is an American YouTuber who makes videos simulating scientific concepts.
==Personal life==
Justin lives in Minneapolis, Minnesota.
Justin studied physics and materials in school. He quit his PhD after realising that “the biggest reason to continue [his] pdh was to be dr helps.” He used to work for Khan Academy.
==YouTube==
Justin uploaded his first video, Why do things exist? Setting the stage for evolution., on May 19, 2018.
The characters in his videos are blob creatures. A group of blob siblings born at the same time is known as a Gob. Justin avoids swearing in videos, as this allows teachers to use them in lessons. Justin feels his videos are “a kind of self expression” and “evoking emotion [is] part of the goal.”
In 2019, Justin gained a significant number of subscribers from 3Blue1Brown.
===Hamilton’s rule video===
Primer uploaded a video titled “The Natural Selection of Altruism,” in which he claimed that Hamilton’s Rule was a lie. He took the video down, and uploaded two new videos. Simulating Green Beard Altruism is the correct part of the original video, and Simulating the Evolution of Sacrificing for Family is a general video on Hamilton’s rule. On December 6, 2020, Primer uploaded How I deceived myself, which reflected on his mistakes. These included trying “to apply Hamilton’s rule to a system with asexual reproduction, and where the genetic variation came from a high mutation rate,” using a logical fallacy, and confirmation bias.
==Subscriber milestones==
*1,000,000 subscribers: November 8, 2020
==References==
Category:Educational YouTubers
Category:American YouTubers
Category:Users who joined in 2018
Category:One million subscribers