While Albert Einstein is credited as the sole discoverer of the Theory of Relativity, it's important to acknowledge that his work was built upon the shoulders of giants. Here's a nuanced understanding:

Einstein's work was inspired by the ideas of:

* Isaac Newton: Einstein's theory builds on Newton's laws of motion and gravity, challenging them in certain extreme situations.

* Hendrik Lorentz and Henri Poincaré: They developed the concept of "Lorentz transformations," which Einstein incorporated into his theory to explain the constant speed of light.

* Max Planck: Planck's quantum theory of energy inspired Einstein's understanding of the photoelectric effect, a key piece of evidence supporting relativity.

However, Einstein's unique contribution was:

* Synthesizing and re-interpreting these existing ideas: He didn't just borrow from others; he connected them in a revolutionary way, developing a new framework for understanding space, time, gravity, and energy.

* Daring to challenge established scientific dogma: Einstein was willing to question the assumptions of his time and propose radical new ideas, which led to the breakthroughs of Special and General Relativity.

* Developing the mathematics needed to express his ideas: Einstein had to develop his own mathematical tools to describe the concepts of curved spacetime and the equivalence of gravity and acceleration.

In essence: Einstein didn't work in isolation. He built upon existing knowledge, but his genius lay in his ability to synthesize those ideas, challenge assumptions, and develop new mathematical tools to express his revolutionary concepts.

Therefore, it's more accurate to say that Einstein built upon the work of others to develop his Theory of Relativity, rather than saying someone else "helped" him discover it. He was the one who took the leap of imagination and mathematical rigor to turn existing ideas into a groundbreaking new theory.